diff --git a/vllm_ascend/platform.py b/vllm_ascend/platform.py
index 2b847de1..1f22e564 100644
--- a/vllm_ascend/platform.py
+++ b/vllm_ascend/platform.py
@@ -96,7 +96,7 @@ def check_and_update_config(cls, vllm_config: VllmConfig) -> None:
             parallel_config.worker_cls = "vllm_ascend.worker.NPUWorker"
         cache_config = vllm_config.cache_config
         if cache_config and cache_config.block_size is None:
-            cache_config.block_size = 16
+            cache_config.block_size = 128
 
     @classmethod
     def get_attn_backend_cls(cls, selected_backend, head_size, dtype,