DELETE FROM `pre_ucenter_pm_lists` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_members` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_members` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_0` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_1` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_2` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_3` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_4` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_5` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_6` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_7` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_8` WHERE 1 ;
DELETE FROM `pre_ucenter_pm_messages_9` WHERE 1 ;

以上SQL便是简单清除全部短消息的语句，进去MYSQL运行就好了。

最新那些恶意分子一直在短消息里作恶，所以只能清除短消息了，论坛也关闭普通用户短消息功能