diff --git a/pilot/scene/chat_knowledge/url/chat.py b/pilot/scene/chat_knowledge/url/chat.py
index 0c7ac1cd2..cc8d89d4a 100644
--- a/pilot/scene/chat_knowledge/url/chat.py
+++ b/pilot/scene/chat_knowledge/url/chat.py
@@ -52,7 +52,9 @@ class ChatUrlKnowledge(BaseChat):
         )
 
         # url soruce in vector
-        self.knowledge_embedding_client.knowledge_embedding()
+        if not self.knowledge_embedding_client.vector_exist():
+            self.knowledge_embedding_client.knowledge_embedding()
+        logger.info("url embedding success")
 
     def generate_input_values(self):
         docs = self.knowledge_embedding_client.similar_search(