解决方法:把mysql用户登录密码加密规则还原成mysql_native_password.
1.打开命令行小黑屏,进入MySQL的bin目录,然后输入mysql -u root -p,输入密码
2.然后输入
1、ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER; #修改加密规则
2、ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密码'; #更新一下用户的密码
3、FLUSH PRIVILEGES; #刷新权限
4、可以成功链接Navicat for MySQL