diff --git a/server/knowledge_base/kb_service/milvus_kb_service.py b/server/knowledge_base/kb_service/milvus_kb_service.py
index f9c40c0..87588ed 100644
--- a/server/knowledge_base/kb_service/milvus_kb_service.py
+++ b/server/knowledge_base/kb_service/milvus_kb_service.py
@@ -45,10 +45,10 @@ class MilvusKBService(KBService):
     def do_drop_kb(self):
         self.milvus.col.drop()
 
-    def do_search(self, query: str, top_k: int, score_threshold: float, embeddings: Embeddings) -> List[Document]:
+    def do_search(self, query: str, top_k: int, embeddings: Embeddings):
         # todo: support score threshold
         self._load_milvus(embeddings=embeddings)
-        return self.milvus.similarity_search(query, top_k, score_threshold=SCORE_THRESHOLD)
+        return self.milvus.similarity_search_with_score(query, top_k)
 
     def add_doc(self, kb_file: KnowledgeFile):
         """
@@ -76,6 +76,7 @@ class MilvusKBService(KBService):
 if __name__ == '__main__':
     # 测试建表使用
     from server.db.base import Base, engine
+
     Base.metadata.create_all(bind=engine)
     milvusService = MilvusKBService("test")
     milvusService.add_doc(KnowledgeFile("README.md", "test"))
diff --git a/server/knowledge_base/kb_service/pg_kb_service.py b/server/knowledge_base/kb_service/pg_kb_service.py
index a3f9318..d51a113 100644
--- a/server/knowledge_base/kb_service/pg_kb_service.py
+++ b/server/knowledge_base/kb_service/pg_kb_service.py
@@ -43,7 +43,7 @@ class PGKBService(KBService):
             '''))
             connect.commit()
 
-    def do_search(self, query: str, top_k: int, score_threshold: float, embeddings: Embeddings) -> List[Document]:
+    def do_search(self, query: str, top_k: int, embeddings: Embeddings):
         # todo: support score threshold
         self._load_pg_vector(embeddings=embeddings)
         return self.pg_vector.similarity_search_with_score(query, top_k)
@@ -76,6 +76,7 @@ class PGKBService(KBService):
 
 if __name__ == '__main__':
     from server.db.base import Base, engine
+
     Base.metadata.create_all(bind=engine)
     pGKBService = PGKBService("test")
     pGKBService.create_kb()