1、使用插件Delete Duplicate Posts

2、使用mysql管理工具执行下面的sql语句

CREATE TABLE my_tmp AS SELECT MIN(ID) AS col1 FROM wp_posts GROUP BY post_title;

DELETE FROM wp_posts WHERE ID NOT IN (SELECT col1 FROM my_tmp);

DROP TABLE my_tmp;

3、写一个PHP文件，取名delete.php。上传至网站根目录，打开浏览器运行http://www.域名/delete.php

代码如下：

<?php
require(‘./wp-load.php’);
$strsql = “create table my_tmp as select min(ID) as col1 from wp_posts group by post_title”;
$strsql1 = “delete from wp_posts where ID not in (select col1 from my_tmp)”;
$strsql2 = “drop table my_tmp”;
$result = mysql_query($strsql);
$result = mysql_query($strsql1);
$result = mysql_query($strsql2);
?>

注意：按照以上方法执行，可能会出现菜单不显示。检查发现进入wordpress后台，点击文章-》分类目录，重新编辑所有分类目录，然后去外观-》菜单，重新编辑菜单即可。