diff --git a/app/wordfreqCMD.py b/app/wordfreqCMD.py
index 342cd2c..5c84766 100644
--- a/app/wordfreqCMD.py
+++ b/app/wordfreqCMD.py
@@ -39,7 +39,7 @@ def file2str(fname):#文件转字符
 
 
 def remove_punctuation(s): # 这里是s是形参 (parameter)。函数被调用时才给s赋值。
-    special_characters = '_©~=+[]*&$%^@.,?!:;#()"“”—‘’|；...' # 把里面的字符都去掉
+    special_characters = '\_©~<=>+-/[]*&$%^@.,?!:;#()"“”—‘’{}|《》【】、！￥（）；：？。，' # 把里面的字符都去掉
     for c in special_characters:
         s = s.replace(c, ' ') # 防止出现把 apple,apple 移掉逗号后变成 appleapple 情况
     s = s.replace('--', ' ')