使用PHPMYADMIN时报错： Client does not support authentication protocol requested by server; consider upgrading MySQL client 官方的说法是 MySQL 4.1 and up uses an authentication protocol based on a password hashing algorithm that is incompatible with that used by older clients. ..... 如果你升级mysql到4.1以上版本后遇到以上问题,请先确定你的mysql client 是4.1或者更高版本.(WINDOWS下有问题你就直接跳到下面看解决方法了,因为MYSQL 在WINDOWS是client和server一起装上了的) 请使用以下两种方法之一 其一: mysql> SET PASSWORD FOR -> "some_user"@"some_host" = OLD_PASSWORD("newpwd"); 其二: mysql> UPDATE mysql.user SET Password = OLD_PASSWORD("newpwd") -> WHERE Host = "some_host" AND User = "some_user"; mysql> FLUSH PRIVILEGES; （出处：Viphot）