diff --git a/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_scheduler.py b/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_scheduler.py
index 80468456..2629b695 100644
--- a/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_scheduler.py
+++ b/vllm_ascend/distributed/kv_transfer/kv_pool/ascend_store/pool_scheduler.py
@@ -78,6 +78,9 @@ class KVPoolScheduler:
         else:
             token_len = len(request.prompt_token_ids)
 
+        if token_len < self._block_size:
+            return 0, False
+
         num_external_hit_tokens = self.client.lookup(token_len, request.block_hashes)
 
         if num_external_hit_tokens == request.num_tokens: