diff --git a/doc/InGameMall.py b/doc/InGameMall.py
index 4d4fe7d4..237c52a6 100644
--- a/doc/InGameMall.py
+++ b/doc/InGameMall.py
@@ -47,9 +47,7 @@ class InGameMall(object):
                 'url': 'webapp/index.php?c=InGameMall&a=buy',
                 'params': [
                     _common.ReqHead(),
-                    ['item_id', '', '道具id'],
-                    ['amount', '', '出售数量'],
-                    ['price', '', '出售价格'],
+                    ['order_id', '', '订单id'],
                 ],
                 'response': [
                     _common.RspHead()