diff --git a/sdk/python/ragflow_sdk/ragflow.py b/sdk/python/ragflow_sdk/ragflow.py
index a84c3515e..e34b57b0c 100644
--- a/sdk/python/ragflow_sdk/ragflow.py
+++ b/sdk/python/ragflow_sdk/ragflow.py
@@ -170,7 +170,7 @@ class RAGFlow:
                 "keyword": keyword,
                 "question": question,
                 "dataset_ids": dataset_ids,
-                "documents": document_ids
+                "document_ids": document_ids
             }
             # Send a POST request to the backend service (using requests library as an example, actual implementation may vary)
             res = self.post('/retrieval',json=data_json)