diff --git a/doc/_common.py b/doc/_common.py
index fc7d72a6..a9df2631 100644
--- a/doc/_common.py
+++ b/doc/_common.py
@@ -12,7 +12,7 @@ class RspHead(object):
 
     def __init__(self, **kwargs):
         self.fields = [
-            ['errcode', 0, '错误码/0 成功；1 失败；2余额不足'],
+            ['errcode', 0, '错误码/0 成功；1 失败'],
             ['errmsg', '', '错误描述'],
         ]
         for (key, value) in kwargs.items():