diff --git a/backend/app/main_graph/utils/main_graph_builder.py b/backend/app/main_graph/utils/main_graph_builder.py
index ab391b0..45c1222 100644
--- a/backend/app/main_graph/utils/main_graph_builder.py
+++ b/backend/app/main_graph/utils/main_graph_builder.py
@@ -135,7 +135,7 @@ def build_react_main_graph(llm=None, tools=None, mem0_client=None) -> StateGraph
     
     # 设置全局 mem0_client
     if mem0_client:
-        set_global_mem0_client(mem0_client)
+        set_mem0_client(mem0_client)
     
     # 创建节点
     llm_node = None