diff --git a/apps/application/flow/i_step_node.py b/apps/application/flow/i_step_node.py
index 2107f6f8f..e1bae631a 100644
--- a/apps/application/flow/i_step_node.py
+++ b/apps/application/flow/i_step_node.py
@@ -111,7 +111,7 @@ class FlowParamsSerializer(serializers.Serializer):
 
     client_type = serializers.CharField(required=False, error_messages=ErrMessage.char("客户端类型"))
 
-    user_id = serializers.CharField(required=True, error_messages=ErrMessage.char("用户id"))
+    user_id = serializers.UUIDField(required=True, error_messages=ErrMessage.char("用户id"))
 
 
 class INode: