diff --git a/sdk/python/ragflow_sdk/modules/document.py b/sdk/python/ragflow_sdk/modules/document.py
index 6cb0e3b5e..70c1ac842 100644
--- a/sdk/python/ragflow_sdk/modules/document.py
+++ b/sdk/python/ragflow_sdk/modules/document.py
@@ -44,6 +44,7 @@ class Document(Base):
         self.process_duration = 0.0
         self.run = "0"
         self.status = "1"
+        self.meta_fields = {}
         for k in list(res_dict.keys()):
             if k not in self.__dict__:
                 res_dict.pop(k)