diff --git a/web/core/mw.py b/web/core/mw.py
index 38427e4d0..19921891e 100644
--- a/web/core/mw.py
+++ b/web/core/mw.py
@@ -205,7 +205,7 @@ def readFile(filename):
         print(e)
         return False
 
-def writeFile(filename, content, mode='aw+'):
+def writeFile(filename, content, mode='w+'):
     # 写文件内容
     try:
         fp = open(filename, mode)