diff --git a/mindinsight/lineagemgr/querier/query_model.py b/mindinsight/lineagemgr/querier/query_model.py
index 007c2d4c83592726bb259f3ee574712457655585..dcdac321273f0f8cbcdf092606dad6829a66ee00 100644
--- a/mindinsight/lineagemgr/querier/query_model.py
+++ b/mindinsight/lineagemgr/querier/query_model.py
@@ -403,7 +403,5 @@ class LineageObj:
         """
         if not user_defined_info_list:
             return
-        user_defined_infos = dict()
         for user_defined_info in user_defined_info_list:
-            user_defined_infos.update(user_defined_info)
-        self._lineage_info[self._name_user_defined] = user_defined_infos
+            self._lineage_info[self._name_user_defined].update(user_defined_info)