diff --git a/src/tools/not_using/lpmm_get_knowledge.py b/src/tools/not_using/lpmm_get_knowledge.py
index df4fa6a4f..80b9b617b 100644
--- a/src/tools/not_using/lpmm_get_knowledge.py
+++ b/src/tools/not_using/lpmm_get_knowledge.py
@@ -36,6 +36,11 @@ class SearchKnowledgeFromLPMMTool(BaseTool):
             query = function_args.get("query")
             # threshold = function_args.get("threshold", 0.4)
 
+            # 检查LPMM知识库是否启用
+            if qa_manager is None:
+                logger.debug("LPMM知识库已禁用，跳过知识获取")
+                return {"type": "info", "id": query, "content": "LPMM知识库已禁用"}
+
             # 调用知识库搜索
 
             knowledge_info = qa_manager.get_knowledge(query)