diff --git a/tests/ut/attention/test_mla_v1.py b/tests/ut/attention/test_mla_v1.py
index 5061ff37..3ee8116c 100755
--- a/tests/ut/attention/test_mla_v1.py
+++ b/tests/ut/attention/test_mla_v1.py
@@ -4,7 +4,8 @@ from unittest.mock import MagicMock, patch
 import torch
 from vllm.config import CacheConfig, ModelConfig, SchedulerConfig, VllmConfig
 from vllm.distributed.parallel_state import GroupCoordinator
-from vllm.model_executor.layers.linear import LinearBase
+from vllm.model_executor.layers.linear import (LinearBase,
+                                               UnquantizedLinearMethod)
 
 from tests.ut.base import TestBase
 from vllm_ascend.ascend_config import init_ascend_config
@@ -972,16 +973,13 @@ class TestAscendMLAImpl(TestBase):
     def test_process_weights_after_loading(self, mock_format_cast):
         layer = MagicMock(spec=LinearBase)
         layer.input_size_per_partition = 10
-        quant_method = MagicMock()
-        apply = MagicMock()
-        quant_method.apply = apply
+        quant_method = MagicMock(spec=UnquantizedLinearMethod)
         layer.quant_method = quant_method
         shape_0 = self.impl.num_heads * (self.impl.qk_nope_head_dim +
                                          self.impl.v_head_dim)
         shape_1 = self.impl.kv_lora_rank
         layer.weight = torch.randn(shape_0, shape_1)
         self.impl.kv_b_proj = layer
-        apply.return_value = layer.weight.T
         mock_format_cast.return_value = layer.weight
         self.impl.process_weights_after_loading(torch.bfloat16)
 
diff --git a/tests/ut/ops/test_linear.py b/tests/ut/ops/test_linear.py
index 995a69f4..4718002c 100644
--- a/tests/ut/ops/test_linear.py
+++ b/tests/ut/ops/test_linear.py
@@ -1,3 +1,4 @@
+import os
 import unittest
 from unittest import mock
 from unittest.mock import MagicMock, patch
@@ -61,22 +62,24 @@ class TestAscendUnquantizedLinearMethod(TestBase):
         mock_dtype = mock.PropertyMock(return_value=torch.float16)
         type(self.layer.weight.data).dtype = mock_dtype
 
-    @mock.patch("vllm_ascend.ops.linear.is_enable_nz")
+    @patch.dict(os.environ, {"VLLM_ASCEND_ENABLE_NZ": "0"})
     @mock.patch("torch_npu.npu_format_cast")
-    def test_process_weights_after_loading_enable_nz(self, mock_format_cast,
-                                                     mock_is_nz):
-        mock_is_nz.return_value = 1
-        self.method.process_weights_after_loading(self.layer)
-        mock_format_cast.assert_called_once()
-
-    @mock.patch("vllm_ascend.ops.linear.is_enable_nz")
-    @mock.patch("torch_npu.npu_format_cast")
-    def test_process_weights_after_loading_disable_nz(self, mock_format_cast,
-                                                      mock_is_nz):
-        mock_is_nz.return_value = 0
+    def test_process_weights_after_loading_with_nz0(self, mock_format_cast):
         self.method.process_weights_after_loading(self.layer)
         mock_format_cast.assert_not_called()
 
+    @patch.dict(os.environ, {"VLLM_ASCEND_ENABLE_NZ": "1"})
+    @mock.patch("torch_npu.npu_format_cast")
+    def test_process_weights_after_loading_with_nz1(self, mock_format_cast):
+        self.method.process_weights_after_loading(self.layer)
+        mock_format_cast.assert_not_called()
+
+    @patch.dict(os.environ, {"VLLM_ASCEND_ENABLE_NZ": "2"})
+    @mock.patch("torch_npu.npu_format_cast")
+    def test_process_weights_after_loading_with_nz2(self, mock_format_cast):
+        self.method.process_weights_after_loading(self.layer)
+        mock_format_cast.assert_called_once()
+
 
 class TestAscendRowParallelLinear(BaseLinearTest):
 
diff --git a/tests/ut/quantization/test_w4a4_flatquant_dynamic.py b/tests/ut/quantization/test_w4a4_flatquant_dynamic.py
index ce8cfec6..d02ad6bd 100644
--- a/tests/ut/quantization/test_w4a4_flatquant_dynamic.py
+++ b/tests/ut/quantization/test_w4a4_flatquant_dynamic.py
@@ -199,7 +199,6 @@ class TestW4A4FlatQuantDynamic(unittest.TestCase):
                                     (self.output_size, self.input_size // 8),
                                     dtype=torch.int32)
         mock_pack_weights.return_value = mock_packed
-        self.method.transpose_weight = False
         self.method.process_weights_after_loading(layer)
         mock_pack_weights.assert_called_once()
         self.assertFalse(hasattr(layer, 'weight'))
@@ -212,35 +211,6 @@ class TestW4A4FlatQuantDynamic(unittest.TestCase):
         self.assertEqual(layer.left_trans.shape, (24, 24))
         self.assertTrue(layer.left_trans.is_contiguous())
 
-    @patch('vllm_ascend.quantization.w4a4_flatquant_dynamic.pack_int4_weights')
-    def test_process_weights_after_loading_with_transpose(
-            self, mock_pack_weights):
-        """Tests weight processing after loading, with transpose."""
-        layer = nn.Module()
-        layer.weight = torch.randint(-8,
-                                     7, (self.output_size, self.input_size),
-                                     dtype=torch.int8)
-        layer.weight_scale = torch.randn(self.output_size,
-                                         1,
-                                         dtype=torch.bfloat16)
-        layer.weight_offset = torch.randn(self.output_size,
-                                          1,
-                                          dtype=torch.bfloat16)
-        layer.left_trans = torch.randn(24, 24)
-        layer.right_trans = torch.randn(32, 32)
-        layer.clip_ratio = torch.tensor([0.9])
-        mock_packed = torch.randint(0,
-                                    100,
-                                    (self.output_size, self.input_size // 8),
-                                    dtype=torch.int32)
-        mock_pack_weights.return_value = mock_packed
-        self.method.transpose_weight = True
-        self.method.process_weights_after_loading(layer)
-        self.assertTrue(hasattr(layer, 'weight_packed'))
-        self.assertEqual(layer.weight_packed.shape,
-                         (self.input_size // 8, self.output_size))
-        self.assertTrue(layer.weight_packed.is_contiguous())
-
 
 if __name__ == '__main__':
     unittest.main(argv=['first-arg-is-ignored'], exit=False)
diff --git a/tests/ut/quantization/test_w4a8_dynamic.py b/tests/ut/quantization/test_w4a8_dynamic.py
index 2116b0c1..3ed2a877 100644
--- a/tests/ut/quantization/test_w4a8_dynamic.py
+++ b/tests/ut/quantization/test_w4a8_dynamic.py
@@ -62,7 +62,8 @@ class TestAscendW4A8DynamicLinearMethod(TestBase):
 
     @patch('torch_npu.npu_convert_weight_to_int4pack')
     @patch('torch.Tensor.npu')
-    def test_process_weights_after_loading(self, mock_npu,
+    @patch("torch_npu.npu_format_cast")
+    def test_process_weights_after_loading(self, mock_format_cast, mock_npu,
                                            mock_npu_convert_weight):
         mock_npu.side_effect = lambda: torch.zeros(
             (1, 32), dtype=torch.float32)
@@ -85,6 +86,8 @@ class TestAscendW4A8DynamicLinearMethod(TestBase):
         layer.weight_offset_second = torch.nn.Parameter(torch.empty_like(
             layer.weight_scale_second.data),
                                                         requires_grad=False)
+        mock_format_cast.return_value = layer.weight.data.transpose(
+            0, 1).contiguous()
         self.method.process_weights_after_loading(layer)
         self.assertTrue(hasattr(layer, "weight_scale_bias"))
         self.assertEqual(layer.weight_scale_bias.data.shape, (32, ))
@@ -110,6 +113,8 @@ class TestAscendW4A8DynamicLinearMethod(TestBase):
         new_layer.scale_bias = torch.nn.Parameter(torch.zeros(
             (32, 1), dtype=torch.float32),
                                                   requires_grad=False)
+        mock_format_cast.return_value = new_layer.weight.data.transpose(
+            0, 1).contiguous()
         self.method.process_weights_after_loading(new_layer)
         self.assertEqual(new_layer.scale_bias.data.shape, (32, ))
         self.assertTrue(hasattr(new_layer, "weight_scale_second"))
diff --git a/tests/ut/quantization/test_w8a8.py b/tests/ut/quantization/test_w8a8.py
index ba006dfc..9fa549b2 100644
--- a/tests/ut/quantization/test_w8a8.py
+++ b/tests/ut/quantization/test_w8a8.py
@@ -1,3 +1,4 @@
+import os
 from unittest.mock import MagicMock, patch
 
 import torch
@@ -132,20 +133,21 @@ class TestAscendW8A8LinearMethod(TestBase):
         expected_y_output += bias
         self.assertTrue(torch.equal(output, expected_y_output))
 
-    @patch("vllm_ascend.quantization.w8a8.is_enable_nz")
+    @patch.dict(os.environ, {"VLLM_ASCEND_ENABLE_NZ": "0"})
     @patch('torch_npu.npu_format_cast')
-    def test_process_weights_after_loading_not_nz(self, mock_npu_format_cast,
-                                                  mock_is_nz):
+    def test_process_weights_after_loading_with_nz0(self,
+                                                    mock_npu_format_cast):
         layer = MagicMock()
 
-        layer.weight.data = torch.randn(128, 256)
+        layer.weight.data = torch.randint(-127,
+                                          128, (128, 256),
+                                          dtype=torch.int8)
         layer.input_scale.data = torch.tensor([0.1])
         layer.input_offset.data = torch.tensor([0])
         layer.deq_scale = torch.tensor([0.5])
         layer.weight_scale.data = torch.randn(128, 1)
         layer.weight_offset.data = torch.randn(128, 1)
 
-        mock_is_nz.return_value = 0
         mock_npu_format_cast.return_value = MagicMock
         self.method.process_weights_after_loading(layer)
 
@@ -160,20 +162,50 @@ class TestAscendW8A8LinearMethod(TestBase):
         self.assertEqual(layer.weight_offset.data.shape, (128, ))
         mock_npu_format_cast.assert_not_called()
 
-    @patch("vllm_ascend.quantization.w8a8.is_enable_nz")
+    @patch.dict(os.environ, {"VLLM_ASCEND_ENABLE_NZ": "1"})
     @patch('torch_npu.npu_format_cast')
-    def test_process_weights_after_loading_nz(self, mock_npu_format_cast,
-                                              mock_is_nz):
+    def test_process_weights_after_loading_with_nz1(self,
+                                                    mock_npu_format_cast):
         layer = MagicMock()
 
-        layer.weight.data = torch.randn(128, 256)
+        layer.weight.data = torch.randint(-127,
+                                          128, (128, 256),
+                                          dtype=torch.int8)
+        layer.input_scale.data = torch.tensor([0.1])
+        layer.input_offset.data = torch.tensor([0])
+        layer.deq_scale = torch.tensor([0.5])
+        layer.weight_scale.data = torch.randn(128, 1)
+        layer.weight_offset.data = torch.randn(128, 1)
+
+        mock_npu_format_cast.return_value = MagicMock
+        self.method.process_weights_after_loading(layer)
+
+        expected_offset = torch.tensor([0]).repeat(256).to(torch.int8)
+        self.assertTrue(
+            torch.equal(layer.aclnn_input_offset.data, expected_offset))
+        self.assertFalse(layer.aclnn_input_offset.requires_grad)
+
+        self.assertFalse(layer.deq_scale.requires_grad)
+
+        self.assertEqual(layer.weight_scale.data.shape, (128, ))
+        self.assertEqual(layer.weight_offset.data.shape, (128, ))
+        mock_npu_format_cast.assert_called_once()
+
+    @patch.dict(os.environ, {"VLLM_ASCEND_ENABLE_NZ": "2"})
+    @patch('torch_npu.npu_format_cast')
+    def test_process_weights_after_loading_with_nz2(self,
+                                                    mock_npu_format_cast):
+        layer = MagicMock()
+
+        layer.weight.data = torch.randint(-127,
+                                          128, (128, 256),
+                                          dtype=torch.int8)
         layer.input_scale.data = torch.tensor([0.1])
         layer.input_offset.data = torch.tensor([0])
         layer.deq_scale = torch.tensor([0.5])
         layer.weight_scale.data = torch.randn(128, 1)
         layer.weight_offset.data = torch.randn(128, 1)
 
-        mock_is_nz.return_value = 1
         mock_npu_format_cast.return_value = MagicMock
         self.method.process_weights_after_loading(layer)
 
diff --git a/tests/ut/test_utils.py b/tests/ut/test_utils.py
index 3be5e783..6219e686 100644
--- a/tests/ut/test_utils.py
+++ b/tests/ut/test_utils.py
@@ -35,14 +35,6 @@ class TestUtils(TestBase):
         from vllm_ascend import platform
         importlib.reload(platform)
 
-    def test_is_enable_nz(self):
-        with mock.patch("vllm_ascend.utils.envs_ascend.VLLM_ASCEND_ENABLE_NZ",
-                        1):
-            self.assertTrue(utils.is_enable_nz())
-        with mock.patch("vllm_ascend.utils.envs_ascend.VLLM_ASCEND_ENABLE_NZ",
-                        0):
-            self.assertFalse(utils.is_enable_nz())
-
     def test_nd_to_nz_2d(self):
         # can be divided by 16
         input_tensor = torch.randn(32, 64)
diff --git a/vllm_ascend/attention/mla_v1.py b/vllm_ascend/attention/mla_v1.py
index 0646b41c..17a5f04e 100644
--- a/vllm_ascend/attention/mla_v1.py
+++ b/vllm_ascend/attention/mla_v1.py
@@ -14,8 +14,7 @@ from vllm.distributed import (get_decode_context_model_parallel_rank,
                               get_pcp_group)
 from vllm.forward_context import ForwardContext, get_forward_context
 from vllm.logger import logger
-from vllm.model_executor.layers.linear import (LinearBase,
-                                               UnquantizedLinearMethod)
+from vllm.model_executor.layers.linear import UnquantizedLinearMethod
 from vllm.utils.math_utils import cdiv, round_down
 from vllm.v1.attention.backends.utils import AttentionCGSupport
 from vllm.v1.kv_cache_interface import MLAAttentionSpec
@@ -38,8 +37,8 @@ from vllm_ascend.ops.shared_weight_layer import (
     register_layer_to_shared_weight_series)
 from vllm_ascend.ops.weight_prefetch import maybe_npu_prefetch
 from vllm_ascend.quantization.w8a8 import AscendW8A8LinearMethod
-from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_ND, ACL_FORMAT_FRACTAL_NZ,
-                               flashcomm2_o_shared_enabled, is_enable_nz,
+from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_ND,
+                               flashcomm2_o_shared_enabled, maybe_trans_nz,
                                weak_ref_tensors)
 from vllm_ascend.worker.npu_input_batch import NPUInputBatch
 
@@ -796,40 +795,11 @@ class AscendMLAImpl(MLAAttentionImpl):
         return ql_nope.transpose(0, 1), q_pe
 
     def process_weights_after_loading(self, act_dtype: torch.dtype):
-
-        def get_layer_weight(layer):
-            WEIGHT_NAMES = ("weight", "qweight", "weight_packed")
-            for attr in WEIGHT_NAMES:
-                try:
-                    return getattr(layer, attr)
-                except AttributeError:
-                    pass
-            raise AttributeError(
-                f"Layer '{layer}' has no recognized weight attribute:"
-                f" {WEIGHT_NAMES}.")
-
-        def get_and_maybe_dequant_weights(layer: LinearBase):
-            if not isinstance(layer.quant_method, UnquantizedLinearMethod):
-                # NOTE: This should only be used offline, since it's O(N^3)
-                eye = torch.eye(layer.input_size_per_partition,
-                                dtype=act_dtype,
-                                device=get_layer_weight(layer).device)
-                dequant_weights = layer.quant_method.apply(layer,
-                                                           eye,
-                                                           bias=None)
-                del eye
-                # standardize to (output, input)
-                return dequant_weights.T
-            # Weight will be reshaped next. To be on the safe side, the format
-            # of the weight should be reverted to FRACTAL_AND.
-            layer.weight.data = torch_npu.npu_format_cast(
-                layer.weight.data, ACL_FORMAT_FRACTAL_ND)
-            return layer.weight
-
-        # we currently do not have quantized bmm's which are needed for
-        # `W_UV` and `W_UK_T`, we we just store fp16/bf16 copies and perform
-        # the bmm's in 16-bit, the extra memory overhead of this is fairly low
-        kv_b_proj_weight = get_and_maybe_dequant_weights(self.kv_b_proj).T
+        # NOTE: We currently do not support quant kv_b_proj.
+        assert isinstance(self.kv_b_proj.quant_method, UnquantizedLinearMethod)
+        # NOTE: Weight will be reshaped next, we need to revert and transpose it.
+        kv_b_proj_weight = torch_npu.npu_format_cast(
+            self.kv_b_proj.weight.data, ACL_FORMAT_FRACTAL_ND).T
         assert kv_b_proj_weight.shape == (
             self.kv_lora_rank,
             self.num_heads * (self.qk_nope_head_dim + self.v_head_dim)), (
@@ -852,15 +822,8 @@ class AscendMLAImpl(MLAAttentionImpl):
         # Convert from (L, N, P) to (N, P, L)
         self.W_UK_T = W_UK.permute(1, 2, 0).contiguous()
 
-        # Function `get_and_maybe_dequant_weights` will cast the weights to
-        # FRACTAL_AND. So we need to cast to FRACTAL_NZ again.
-        if is_enable_nz():
-            self.kv_b_proj.weight.data = torch_npu.npu_format_cast(
-                self.kv_b_proj.weight.data, ACL_FORMAT_FRACTAL_NZ)
-
-        # Waiting for BMM NZ support
-        # self.W_UV.data = torch_npu.npu_format_cast(self.W_UV.data, 29)
-        # self.W_UK_T.data = torch_npu.npu_format_cast(self.W_UK_T.data, 29)
+        # TODO(zzzzwwjj): Currently, torch.ops._C_ascend.batch_matmul_transpose cannot support weight nz
+        # self.W_UV = maybe_trans_nz(self.W_UV)
 
         if self.enable_mlapo:
             # Currently mlapo only supports W8A8 quantization in MLA scenario
@@ -875,6 +838,9 @@ class AscendMLAImpl(MLAAttentionImpl):
                     "thus mlapo is disabled for these layers.")
         if self.enable_mlapo:
             self._process_weights_for_fused_mlapo(act_dtype)
+        else:
+            # if mlapo, W_UK_T can't trans nz
+            self.W_UK_T = maybe_trans_nz(self.W_UK_T)
 
         if self.fc2_o_shared_enable and is_hidden_layer(
                 self.vllm_config, self.o_proj):
diff --git a/vllm_ascend/attention/sfa_v1.py b/vllm_ascend/attention/sfa_v1.py
index a53e9423..c2fd9dd5 100644
--- a/vllm_ascend/attention/sfa_v1.py
+++ b/vllm_ascend/attention/sfa_v1.py
@@ -9,7 +9,7 @@ from vllm.config import VllmConfig, get_current_vllm_config
 from vllm.distributed import get_tensor_model_parallel_world_size, get_tp_group
 from vllm.forward_context import get_forward_context
 from vllm.logger import logger
-from vllm.model_executor.layers.linear import (LinearBase, ReplicatedLinear,
+from vllm.model_executor.layers.linear import (ReplicatedLinear,
                                                UnquantizedLinearMethod)
 from vllm.triton_utils import HAS_TRITON
 from vllm.v1.attention.backends.utils import AttentionCGSupport
@@ -29,9 +29,8 @@ from vllm_ascend.ops.shared_weight_layer import (
 from vllm_ascend.ops.triton.rope import rope_forward_triton
 from vllm_ascend.ops.weight_prefetch import maybe_npu_prefetch
 from vllm_ascend.quantization.w8a8 import AscendW8A8LinearMethod
-from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_ND, ACL_FORMAT_FRACTAL_NZ,
-                               _round_up, dispose_layer, enable_sp,
-                               is_enable_nz, replace_layer)
+from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_ND, _round_up, dispose_layer,
+                               enable_sp, maybe_trans_nz, replace_layer)
 from vllm_ascend.worker.npu_input_batch import NPUInputBatch
 
 if TYPE_CHECKING:
@@ -404,40 +403,11 @@ class AscendSFAImpl(MLAAttentionImpl):
         self.cp_size = 1
 
     def process_weights_after_loading(self, act_dtype: torch.dtype):
-
-        def get_layer_weight(layer):
-            WEIGHT_NAMES = ("weight", "qweight", "weight_packed")
-            for attr in WEIGHT_NAMES:
-                try:
-                    return getattr(layer, attr)
-                except AttributeError:
-                    pass
-            raise AttributeError(
-                f"Layer '{layer}' has no recognized weight attribute:"
-                f" {WEIGHT_NAMES}.")
-
-        def get_and_maybe_dequant_weights(layer: LinearBase):
-            if not isinstance(layer.quant_method, UnquantizedLinearMethod):
-                # NOTE: This should only be used offline, since it's O(N^3)
-                eye = torch.eye(layer.input_size_per_partition,
-                                dtype=act_dtype,
-                                device=get_layer_weight(layer).device)
-                dequant_weights = layer.quant_method.apply(layer,
-                                                           eye,
-                                                           bias=None)
-                del eye
-                # standardize to (output, input)
-                return dequant_weights.T
-            # Weight will be reshaped next. To be on the safe side, the format
-            # of the weight should be reverted to FRACTAL_AND.
-            layer.weight.data = torch_npu.npu_format_cast(
-                layer.weight.data, ACL_FORMAT_FRACTAL_ND)
-            return layer.weight
-
-        # we currently do not have quantized bmm's which are needed for
-        # `W_UV` and `W_UK_T`, we we just store fp16/bf16 copies and perform
-        # the bmm's in 16-bit, the extra memory overhead of this is fairly low
-        kv_b_proj_weight = get_and_maybe_dequant_weights(self.kv_b_proj).T
+        # NOTE: We currently do not support quant kv_b_proj.
+        assert isinstance(self.kv_b_proj.quant_method, UnquantizedLinearMethod)
+        # NOTE: Weight will be reshaped next, we need to revert and transpose it.
+        kv_b_proj_weight = torch_npu.npu_format_cast(
+            self.kv_b_proj.weight.data, ACL_FORMAT_FRACTAL_ND).T
         assert kv_b_proj_weight.shape == (
             self.kv_lora_rank, self.local_num_heads *
             (self.qk_nope_head_dim + self.v_head_dim)), (
@@ -460,15 +430,9 @@ class AscendSFAImpl(MLAAttentionImpl):
         # Convert from (L, N, P) to (N, P, L)
         self.W_UK_T = W_UK.permute(1, 2, 0).contiguous()
 
-        # Function `get_and_maybe_dequant_weights` will cast the weights to
-        # FRACTAL_AND. So we need to cast to FRACTAL_NZ again.
-        if is_enable_nz():
-            self.kv_b_proj.weight.data = torch_npu.npu_format_cast(
-                self.kv_b_proj.weight.data, ACL_FORMAT_FRACTAL_NZ)
+        # TODO(zzzzwwjj): Currently, torch.ops._C_ascend.batch_matmul_transpose cannot support weight nz
+        # self.W_UV = maybe_trans_nz(self.W_UV)
 
-        # Waiting for BMM NZ support
-        # self.W_UV.data = torch_npu.npu_format_cast(self.W_UV.data, 29)
-        # self.W_UK_T.data = torch_npu.npu_format_cast(self.W_UK_T.data, 29)
         # Dispose kv_b_proj since it is replaced by W_UV and W_UK_T to save memory
         dispose_layer(self.kv_b_proj)
 
@@ -502,6 +466,9 @@ class AscendSFAImpl(MLAAttentionImpl):
                     logger.warning_once(msg)
             else:
                 self._process_weights_for_fused_mlapo(act_dtype)
+        if not self.enable_mlapo:
+            # if mlapo, W_UK_T can't trans nz
+            self.W_UK_T = maybe_trans_nz(self.W_UK_T)
 
     def _v_up_proj(self, x):
         forward_context = get_forward_context()
diff --git a/vllm_ascend/envs.py b/vllm_ascend/envs.py
index 4e92d800..c3c5e967 100644
--- a/vllm_ascend/envs.py
+++ b/vllm_ascend/envs.py
@@ -123,7 +123,10 @@ env_variables: Dict[str, Callable[[], Any]] = {
     lambda: bool(int(os.getenv("MSMONITOR_USE_DAEMON", '0'))),
     "VLLM_ASCEND_ENABLE_MLAPO":
     lambda: bool(int(os.getenv("VLLM_ASCEND_ENABLE_MLAPO", '0'))),
-    # Whether to enable transpose weight and cast format to FRACTAL_NZ.
+    # Whether to enable weight cast format to FRACTAL_NZ.
+    # 0: close nz;
+    # 1: only quant case enable nz;
+    # 2: enable nz as long as possible.
     "VLLM_ASCEND_ENABLE_NZ":
     lambda: int(os.getenv("VLLM_ASCEND_ENABLE_NZ", 1)),
     # Decide whether we should enable CP parallelism.
diff --git a/vllm_ascend/ops/fused_moe/fused_moe.py b/vllm_ascend/ops/fused_moe/fused_moe.py
index 2d0e7afc..2a331ed8 100644
--- a/vllm_ascend/ops/fused_moe/fused_moe.py
+++ b/vllm_ascend/ops/fused_moe/fused_moe.py
@@ -19,7 +19,6 @@ from typing import Any, Callable, Optional
 
 import torch
 import torch.nn.functional as F
-import torch_npu
 from vllm.config import get_current_vllm_config
 from vllm.distributed import (get_dp_group, get_ep_group, get_tp_group,
                               tensor_model_parallel_all_reduce)
@@ -48,8 +47,8 @@ from vllm_ascend.quantization.w4a8_dynamic import \
     AscendW4A8DynamicFusedMoEMethod
 from vllm_ascend.quantization.w8a8_dynamic import \
     AscendW8A8DynamicFusedMoEMethod
-from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_NZ, AscendDeviceType,
-                               enable_sp, get_ascend_device_type, is_enable_nz,
+from vllm_ascend.utils import (AscendDeviceType, enable_sp,
+                               get_ascend_device_type, maybe_trans_nz,
                                npu_stream_switch, shared_expert_dp_enabled,
                                shared_experts_calculation_stream)
 
@@ -73,12 +72,9 @@ class AscendUnquantizedFusedMoEMethod(UnquantizedFusedMoEMethod):
             1, 2).contiguous()
         layer.w2_weight = torch.nn.Parameter(w2_data, requires_grad=False)
 
-        if get_ascend_device_type() != AscendDeviceType._310P and is_enable_nz(
-        ):
-            layer.w13_weight.data = torch_npu.npu_format_cast(
-                layer.w13_weight.data, ACL_FORMAT_FRACTAL_NZ)
-            layer.w2_weight.data = torch_npu.npu_format_cast(
-                layer.w2_weight.data, ACL_FORMAT_FRACTAL_NZ)
+        if get_ascend_device_type() != AscendDeviceType._310P:
+            layer.w13_weight.data = maybe_trans_nz(layer.w13_weight.data)
+            layer.w2_weight.data = maybe_trans_nz(layer.w2_weight.data)
 
     def apply(self,
               layer: torch.nn.Module,
diff --git a/vllm_ascend/ops/linear.py b/vllm_ascend/ops/linear.py
index 53a3b26b..b5fc2bcc 100644
--- a/vllm_ascend/ops/linear.py
+++ b/vllm_ascend/ops/linear.py
@@ -24,7 +24,6 @@ from typing import Optional, Union
 
 import torch
 import torch.nn as nn
-import torch_npu
 from torch.nn.parameter import Parameter
 from vllm.config import get_current_vllm_config
 from vllm.distributed import divide
@@ -37,7 +36,7 @@ from vllm.model_executor.layers.quantization.base_config import \
 from vllm.model_executor.utils import set_weight_attrs
 
 from vllm_ascend.ops.linear_op import get_parallel_op, get_replicated_op
-from vllm_ascend.utils import ACL_FORMAT_FRACTAL_NZ, is_enable_nz
+from vllm_ascend.utils import maybe_trans_nz
 
 
 class AscendUnquantizedLinearMethod(UnquantizedLinearMethod):
@@ -45,11 +44,8 @@ class AscendUnquantizedLinearMethod(UnquantizedLinearMethod):
 
     def process_weights_after_loading(self, layer: torch.nn.Module) -> None:
         super().process_weights_after_loading(layer)
-        if "conv1d" not in layer.prefix and (
-                is_enable_nz() and layer.weight.data.dtype
-                in [torch.float16, torch.bfloat16]):
-            layer.weight.data = torch_npu.npu_format_cast(
-                layer.weight.data, ACL_FORMAT_FRACTAL_NZ)
+        if "conv1d" not in layer.prefix:
+            layer.weight.data = maybe_trans_nz(layer.weight.data)
 
 
 # TODO(realliujiaxu): Remove this class after linear of vllm supports custom comm group
diff --git a/vllm_ascend/quantization/w4a4_flatquant_dynamic.py b/vllm_ascend/quantization/w4a4_flatquant_dynamic.py
index 326980fc..f13dae2f 100644
--- a/vllm_ascend/quantization/w4a4_flatquant_dynamic.py
+++ b/vllm_ascend/quantization/w4a4_flatquant_dynamic.py
@@ -86,7 +86,6 @@ class AscendW4A4FlatQuantDynamicLinearMethod:
     input_size = 0
 
     def __init__(self):
-        self.transpose_weight = False
         self.sym = True
 
     @staticmethod
@@ -176,9 +175,8 @@ class AscendW4A4FlatQuantDynamicLinearMethod:
         return output
 
     def process_weights_after_loading(self, layer):
+        # NOTE: Currently, w4a4 can't support weight nz
         weight_packed = pack_int4_weights(layer.weight.data)
-        if self.transpose_weight:
-            weight_packed = weight_packed.transpose(0, 1).contiguous()
         layer.register_parameter(
             'weight_packed',
             torch.nn.Parameter(weight_packed, requires_grad=False))
diff --git a/vllm_ascend/quantization/w4a8_dynamic.py b/vllm_ascend/quantization/w4a8_dynamic.py
index dc5f580d..45a7bc18 100644
--- a/vllm_ascend/quantization/w4a8_dynamic.py
+++ b/vllm_ascend/quantization/w4a8_dynamic.py
@@ -27,7 +27,7 @@ from vllm.forward_context import get_forward_context
 from vllm_ascend.ascend_config import get_ascend_config
 from vllm_ascend.distributed.parallel_state import get_mc2_group
 from vllm_ascend.ops.fused_moe.experts_selector import select_experts
-from vllm_ascend.utils import ACL_FORMAT_FRACTAL_NZ, is_enable_nz
+from vllm_ascend.utils import maybe_trans_nz
 
 
 class AscendW4A8DynamicLinearMethod:
@@ -35,8 +35,6 @@ class AscendW4A8DynamicLinearMethod:
     """
 
     def __init__(self):
-        self.transpose_weight = True
-
         vllm_config = get_current_vllm_config()
         self.group_size = vllm_config.quant_config.quant_description.get(
             "group_size", 256)
@@ -170,8 +168,8 @@ class AscendW4A8DynamicLinearMethod:
         )
 
     def process_weights_after_loading(self, layer: torch.nn.Module):
-        if self.transpose_weight:
-            layer.weight.data = layer.weight.data.transpose(0, 1).contiguous()
+        layer.weight.data = layer.weight.data.transpose(0, 1).contiguous()
+        layer.weight.data = maybe_trans_nz(layer.weight.data)
         layer.weight_scale.data = layer.weight_scale.data.flatten().to(
             torch.float32)
         layer.weight_offset.data = layer.weight_offset.data.flatten()
@@ -214,8 +212,6 @@ class AscendW4A8DynamicFusedMoEMethod:
     """
 
     def __init__(self):
-        self.transpose_weight = True
-
         self.ep_group = get_ep_group()
 
         vllm_config = get_current_vllm_config()
@@ -462,11 +458,10 @@ class AscendW4A8DynamicFusedMoEMethod:
                                           torch.quint4x2, -1, False)
 
     def process_weights_after_loading(self, layer):
-        if self.transpose_weight:
-            layer.w13_weight.data = layer.w13_weight.data.transpose(
-                1, 2).contiguous()
-            layer.w2_weight.data = layer.w2_weight.data.transpose(
-                1, 2).contiguous()
+        layer.w13_weight.data = layer.w13_weight.data.transpose(
+            1, 2).contiguous()
+        layer.w2_weight.data = layer.w2_weight.data.transpose(1,
+                                                              2).contiguous()
 
         w13_weight_scale_second = layer.w13_weight_scale_second.data if hasattr(
             layer, "w13_weight_scale_second") else None
@@ -487,10 +482,7 @@ class AscendW4A8DynamicFusedMoEMethod:
 
         self.update_bias(layer, w13_bias, w2_bias)
 
-        if is_enable_nz():
-            layer.w13_weight.data = torch_npu.npu_format_cast(
-                layer.w13_weight.data, ACL_FORMAT_FRACTAL_NZ)
-            layer.w2_weight.data = torch_npu.npu_format_cast(
-                layer.w2_weight.data, ACL_FORMAT_FRACTAL_NZ)
+        layer.w13_weight.data = maybe_trans_nz(layer.w13_weight.data)
+        layer.w2_weight.data = maybe_trans_nz(layer.w2_weight.data)
         layer.w13_weight.data = self.pack_to_int32(layer.w13_weight.data)
         layer.w2_weight.data = self.pack_to_int32(layer.w2_weight.data)
diff --git a/vllm_ascend/quantization/w8a8.py b/vllm_ascend/quantization/w8a8.py
index 349946d5..30846a3c 100644
--- a/vllm_ascend/quantization/w8a8.py
+++ b/vllm_ascend/quantization/w8a8.py
@@ -21,9 +21,8 @@ import torch
 import torch_npu
 from vllm.forward_context import get_forward_context
 
-from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_NZ,
-                               COMPRESSED_TENSORS_METHOD, AscendDeviceType,
-                               get_ascend_device_type, is_enable_nz)
+from vllm_ascend.utils import (COMPRESSED_TENSORS_METHOD, AscendDeviceType,
+                               get_ascend_device_type, maybe_trans_nz)
 
 
 def quant_per_tensor(in_tensor: torch.Tensor,
@@ -42,9 +41,7 @@ class AscendW8A8LinearMethod:
     """
 
     def __init__(self) -> None:
-        # aclnn quant matmul requires to transpose matrix B, set to true by default.
-        self.transpose_weight = get_ascend_device_type(
-        ) != AscendDeviceType._310P
+        pass
 
     @staticmethod
     def get_weight(
@@ -189,11 +186,9 @@ class AscendW8A8LinearMethod:
         layer.aclnn_input_offset = torch.nn.Parameter(
             layer.input_offset.data.repeat(expanding_factor),
             requires_grad=False).to(layer.aclnn_input_scale.dtype)
-        if self.transpose_weight:
+        if get_ascend_device_type() != AscendDeviceType._310P:
             layer.weight.data = layer.weight.data.transpose(0, 1).contiguous()
-        if is_enable_nz():
-            layer.weight.data = torch_npu.npu_format_cast(
-                layer.weight.data, ACL_FORMAT_FRACTAL_NZ)
+        layer.weight.data = maybe_trans_nz(layer.weight.data)
         layer.weight_scale.data = torch.flatten(layer.weight_scale.data)
         layer.weight_offset.data = torch.flatten(layer.weight_offset.data)
         ascend_quant_method = getattr(layer, "ascend_quant_method", "")
diff --git a/vllm_ascend/quantization/w8a8_dynamic.py b/vllm_ascend/quantization/w8a8_dynamic.py
index 8952d3cf..e32360ce 100644
--- a/vllm_ascend/quantization/w8a8_dynamic.py
+++ b/vllm_ascend/quantization/w8a8_dynamic.py
@@ -29,7 +29,7 @@ from vllm_ascend.ascend_forward_context import MoECommType
 from vllm_ascend.distributed.parallel_state import get_mc2_group
 from vllm_ascend.flash_common3_context import get_flash_common3_context
 from vllm_ascend.ops.fused_moe.experts_selector import select_experts
-from vllm_ascend.utils import ACL_FORMAT_FRACTAL_NZ, is_enable_nz
+from vllm_ascend.utils import maybe_trans_nz
 
 
 class AscendW8A8DynamicLinearMethod:
@@ -37,7 +37,7 @@ class AscendW8A8DynamicLinearMethod:
     """
 
     def __init__(self):
-        self.transpose_weight = True
+        pass
 
     @staticmethod
     def get_weight(input_size: int, output_size: int,
@@ -91,12 +91,9 @@ class AscendW8A8DynamicLinearMethod:
         return output
 
     def process_weights_after_loading(self, layer):
-        if self.transpose_weight:
-            layer.weight.data = layer.weight.data.transpose(0, 1).contiguous()
+        layer.weight.data = layer.weight.data.transpose(0, 1).contiguous()
         # cast quantized weight tensors in NZ format for higher inference speed
-        if is_enable_nz():
-            layer.weight.data = torch_npu.npu_format_cast(
-                layer.weight.data, ACL_FORMAT_FRACTAL_NZ)
+        layer.weight.data = maybe_trans_nz(layer.weight.data)
         layer.weight_scale.data = layer.weight_scale.data.flatten()
         layer.weight_scale_fp32 = layer.weight_scale.data.to(torch.float32)
         layer.weight_offset.data = layer.weight_offset.data.flatten()
@@ -107,8 +104,6 @@ class AscendW8A8DynamicFusedMoEMethod:
     """
 
     def __init__(self):
-        self.transpose_weight = True
-
         self.ep_group = get_ep_group()
 
         vllm_config = get_current_vllm_config()
@@ -270,14 +265,12 @@ class AscendW8A8DynamicFusedMoEMethod:
             mc2_mask=kwargs.get("mc2_mask", None))
 
     def process_weights_after_loading(self, layer):
-        if self.transpose_weight:
-            layer.w13_weight.data = layer.w13_weight.data.transpose(
-                1, 2).contiguous()
-            layer.w2_weight.data = layer.w2_weight.data.transpose(
-                1, 2).contiguous()
-        if is_enable_nz():
-            torch_npu.npu_format_cast_(layer.w13_weight, ACL_FORMAT_FRACTAL_NZ)
-            torch_npu.npu_format_cast_(layer.w2_weight, ACL_FORMAT_FRACTAL_NZ)
+        layer.w13_weight.data = layer.w13_weight.data.transpose(
+            1, 2).contiguous()
+        layer.w2_weight.data = layer.w2_weight.data.transpose(1,
+                                                              2).contiguous()
+        layer.w13_weight.data = maybe_trans_nz(layer.w13_weight.data)
+        layer.w2_weight.data = maybe_trans_nz(layer.w2_weight.data)
         layer.w13_weight_scale.data = layer.w13_weight_scale.data.view(
             layer.w13_weight_scale.data.shape[0], -1)
         layer.w13_weight_scale_fp32 = layer.w13_weight_scale.data.to(
diff --git a/vllm_ascend/utils.py b/vllm_ascend/utils.py
index 9e2431bb..e7b3b8ec 100644
--- a/vllm_ascend/utils.py
+++ b/vllm_ascend/utils.py
@@ -122,8 +122,22 @@ def _unregister_print_streams_on_exit():
 atexit.register(_unregister_print_streams_on_exit)
 
 
-def is_enable_nz():
-    return envs_ascend.VLLM_ASCEND_ENABLE_NZ
+def maybe_trans_nz(weight: torch.Tensor):
+    if not envs_ascend.VLLM_ASCEND_ENABLE_NZ:
+        # NZ is not enabled
+        return weight
+    if weight.dtype == torch.float:
+        # fp32 can not support NZ
+        return weight
+    elif weight.dtype in {torch.bfloat16, torch.float16}:
+        # bf16/fp16 will trans nz when VLLM_ASCEND_ENABLE_NZ is 2
+        if envs_ascend.VLLM_ASCEND_ENABLE_NZ == 2:
+            return torch_npu.npu_format_cast(weight, ACL_FORMAT_FRACTAL_NZ)
+        else:
+            return weight
+    else:
+        # quant weight will trans nz by default
+        return torch_npu.npu_format_cast(weight, ACL_FORMAT_FRACTAL_NZ)
 
 
 def _round_up(x: int, align: int):
diff --git a/vllm_ascend/worker/model_runner_v1.py b/vllm_ascend/worker/model_runner_v1.py
index 327a369a..94ae0916 100644
--- a/vllm_ascend/worker/model_runner_v1.py
+++ b/vllm_ascend/worker/model_runner_v1.py
@@ -114,10 +114,10 @@ from vllm_ascend.spec_decode import get_spec_decode_method
 from vllm_ascend.spec_decode.eagle_proposer import EagleProposer
 from vllm_ascend.spec_decode.interface import SpecDcodeType
 from vllm_ascend.spec_decode.mtp_proposer import MtpProposer
-from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_ND, ACL_FORMAT_FRACTAL_NZ,
-                               AscendDeviceType, ProfileExecuteDuration,
-                               enable_sp, get_ascend_device_type, is_enable_nz,
-                               is_moe_model, lmhead_tp_enable, vllm_version_is)
+from vllm_ascend.utils import (AscendDeviceType, ProfileExecuteDuration,
+                               enable_sp, get_ascend_device_type, is_moe_model,
+                               lmhead_tp_enable, maybe_trans_nz,
+                               vllm_version_is)
 from vllm_ascend.worker.npu_input_batch import NPUInputBatch
 
 from vllm_ascend.ascend_forward_context import (  # isort: skip
@@ -137,9 +137,6 @@ torch.npu.config.allow_internal_format = True
 
 if get_ascend_device_type() == AscendDeviceType._310P:
     torch_npu.npu.set_compile_mode(jit_compile=False)
-    ACL_FORMAT = ACL_FORMAT_FRACTAL_NZ
-else:
-    ACL_FORMAT = ACL_FORMAT_FRACTAL_ND
 
 
 @dataclass
@@ -2225,16 +2222,6 @@ class NPUModelRunner(GPUModelRunner):
             self.model = get_model(vllm_config=self.vllm_config)
             if self.dynamic_eplb:
                 model_register(self.model, self.model_config)
-            if get_ascend_device_type() == AscendDeviceType._310P:
-                from vllm.model_executor.layers.linear import (
-                    MergedColumnParallelLinear, QKVParallelLinear,
-                    RowParallelLinear)
-                for module in self.model.modules():
-                    if isinstance(module,
-                                  (MergedColumnParallelLinear,
-                                   QKVParallelLinear, RowParallelLinear)):
-                        module.weight.data = self._convert_torch_format(
-                            module.weight.data)
             if self.drafter:
                 logger.info("Loading drafter model...")
                 self.drafter.load_model(self.model)
@@ -2255,13 +2242,6 @@ class NPUModelRunner(GPUModelRunner):
                                          self.vllm_config,
                                          runtime_mode=CUDAGraphMode.FULL)
 
-    def _convert_torch_format(self, tensor):
-        if ACL_FORMAT == ACL_FORMAT_FRACTAL_NZ \
-                and not is_enable_nz():
-            return tensor
-        tensor = torch_npu.npu_format_cast(tensor, ACL_FORMAT)
-        return tensor
-
     def initialize_kv_cache(self, kv_cache_config: KVCacheConfig) -> None:
         """
         Initialize KV cache based on `kv_cache_config`.
@@ -2534,9 +2514,10 @@ class NPUModelRunner(GPUModelRunner):
                             self.model_config.hf_text_config.qk_rope_head_dim
                         ]
                     k_cache = raw_k_tensor.view(dtype).view(k_shape)
-                    k_cache = self._convert_torch_format(k_cache)
                     v_cache = raw_v_tensor.view(dtype).view(v_shape)
-                    v_cache = self._convert_torch_format(v_cache)
+                    if get_ascend_device_type() == AscendDeviceType._310P:
+                        k_cache = maybe_trans_nz(k_cache)
+                        v_cache = maybe_trans_nz(v_cache)
                     if self.use_sparse and raw_dsa_k_tensor is not None:
                         dsa_k_cache_shape = (num_blocks,
                                              kv_cache_spec.block_size, 1, 128)
diff --git a/vllm_ascend/worker/worker.py b/vllm_ascend/worker/worker.py
index de23efa7..324cbed0 100644
--- a/vllm_ascend/worker/worker.py
+++ b/vllm_ascend/worker/worker.py
@@ -55,7 +55,7 @@ from vllm_ascend.distributed.parallel_state import init_ascend_model_parallel
 from vllm_ascend.ops.triton.triton_utils import init_device_properties_triton
 from vllm_ascend.platform import NPUPlatform
 from vllm_ascend.utils import (AscendDeviceType, check_ascend_device_type,
-                               enable_sp, get_ascend_device_type, is_enable_nz,
+                               enable_sp, get_ascend_device_type,
                                register_ascend_customop)
 from vllm_ascend.worker.model_runner_v1 import NPUModelRunner
 
@@ -160,7 +160,7 @@ class NPUWorker(WorkerBase):
             used_bytes / GiB_bytes)
 
     def wake_up(self, tags: Optional[list[str]] = None) -> None:
-        if is_enable_nz():
+        if envs_ascend.VLLM_ASCEND_ENABLE_NZ:
             raise ValueError(
                 "FRACTAL_NZ mode is enabled. This may cause model parameter precision issues "
                 "in the RL scenarios. Please set VLLM_ASCEND_ENABLE_NZ=0.")
diff --git a/vllm_ascend/xlite/xlite.py b/vllm_ascend/xlite/xlite.py
index 73ae515a..6ffac6db 100644
--- a/vllm_ascend/xlite/xlite.py
+++ b/vllm_ascend/xlite/xlite.py
@@ -26,10 +26,10 @@ from vllm.logger import logger
 from vllm.sequence import IntermediateTensors
 from xlite._C import AttnMHA, Model, ModelAttnMeta, ModelConfig, Runtime
 
+import vllm_ascend.envs as envs_ascend
 from vllm_ascend.ascend_config import get_ascend_config
 from vllm_ascend.attention.attention_v1 import (AscendAttentionState,
                                                 AscendMetadata)
-from vllm_ascend.utils import is_enable_nz
 
 
 class XliteModel:
@@ -134,7 +134,7 @@ class LlamaXliteModel(XliteModel):
         config.moe_tp_size = 1
 
         config.attn_type = AttnMHA
-        config.weight_nz = is_enable_nz()
+        config.weight_nz = envs_ascend.VLLM_ASCEND_ENABLE_NZ
         scheduler_config = vllm_config.scheduler_config
         max_batch_size = scheduler_config.max_num_seqs
         max_seq_len = vllm_config.model_config.max_model_len