diff --git a/vllm_ascend/platform.py b/vllm_ascend/platform.py
index faed5aea..dd063e28 100644
--- a/vllm_ascend/platform.py
+++ b/vllm_ascend/platform.py
@@ -310,7 +310,10 @@ class NPUPlatform(Platform):
 
         if parallel_config and parallel_config.worker_cls == "auto":
             # TODO: this is a tricky way to disable `use_sequence_parallel_moe` in vllm.
-            os.environ["VLLM_ALL2ALL_BACKEND"] = "flashinfer_all2allv"
+            if vllm_version_is("0.11.0"):
+                os.environ["VLLM_ALL2ALL_BACKEND"] = "flashinfer_all2allv"
+            else:
+                parallel_config.all2all_backend = "flashinfer_all2allv"
             if ascend_config.torchair_graph_config.enabled or ascend_config.enable_shared_expert_dp:
                 parallel_config.worker_cls = "vllm_ascend.torchair.torchair_worker.NPUTorchairWorker"
             else: