您可以尝试使用常规的前pression和分组，如果你的服务器支持。如果我没有记错，你必须重写只有一个参数，我想你可以（如果你使用的是Apache与mod_rewrite的）尝试类似：

You can try to use regular expression and grouping, if your server supports that. If I am not mistaken you have to rewrite only one parameter, I guess you could try something like (if you are using apache with mod_rewrite):

RewriteCond %{QUERY_STRING} ^.*(\btag\b=(\w+|&\w+;)+)
RewriteRule ^(.+) /$1?%1 [L]

编辑：我改进了常规EX pression一点点地匹配标签，无论它的位置在查询字符串和preserve特殊字符序列，如＆放大器;放大器; 另外也应避免与类似的参数（即：它不会被称为alttag参数相匹配）匹配

I improved the regular expression a little bit to match "tag" regardless of its position in the query string and to preserve special characters sequences such as & In addition it should avoid matches with similar parameters (i.e.: it wouldn't match a parameter called "alttag").

编辑＃2：的替代（尤其是如果你要筛选一些参数）是使用外部程序做了改写。本页面：http://httpd.apache.org/docs/2.2/mod/mod_rewrite.html#rewritemap （特别是部分外部重写程序）中包含的有用信息。

Edit #2: An alternative (especially if you have to filter several parameters) is to use an external program to do the rewrite. This page: http://httpd.apache.org/docs/2.2/mod/mod_rewrite.html#rewritemap (in particular the section "External rewriting program") contains useful information.