diff --git a/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_worker.py b/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_worker.py
index 4e69a112..033ea34d 100644
--- a/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_worker.py
+++ b/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_worker.py
@@ -1,6 +1,7 @@
+import importlib
 import math
 import threading
-from collections.abc import Callable, Generator
+from collections.abc import Generator
 
 import torch
 from vllm.config import VllmConfig
@@ -14,9 +15,6 @@ from vllm.distributed import (
 from vllm.logger import logger
 from vllm.v1.core.kv_cache_utils import BlockHash
 
-from vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.backend.backend import Backend
-from vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.backend.memcache_backend import MemcacheBackend
-from vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.backend.mooncake_backend import MooncakeBackend
 from vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.config_data import (
     AscendConnectorMetadata,
     ChunkedTokenDatabase,
@@ -32,9 +30,15 @@ from vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.kv_transfer import
     KVTransferThread,
 )
 
-backend_map: dict[str, Callable[..., Backend]] = {
-    "mooncake": MooncakeBackend,
-    "memcache": MemcacheBackend,
+backend_map = {
+    "mooncake": {
+        "name": "MooncakeBackend",
+        "path": "vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.backend.mooncake_backend",
+    },
+    "memcache": {
+        "name": "MemcacheBackend",
+        "path": "vllm_ascend.distributed.kv_transfer.kv_pool.ascend_store.backend.memcache_backend",
+    },
 }
 
 
@@ -125,7 +129,13 @@ class KVPoolWorker:
 
         self.token_database = ChunkedTokenDatabase(self.metadata, self.block_size, self.use_mla, partitions)
 
-        real_backend = backend_map.get(self.backend.lower())
+        backend = backend_map.get(self.backend.lower())
+        assert backend is not None
+        backend_path = backend.get("path")
+        backend_name = backend.get("name")
+        assert backend_path is not None and backend_name is not None
+        backend_module = importlib.import_module(backend_path)
+        real_backend = getattr(backend_module, backend_name)
 
         # be removed later
         if self.backend == "mooncake":