登录数据后。选择 mysql 数据库 use mysql; 修改密码 update user set authentication_string=PASSWORD("mynewpassword") where user="root"; 更新密码直接报错 ERROR 1819 (HY000): Your password does not satisfy the current policy requirements 设置密码安全机制 set global validate_password_policy=0; 再更新密码,然后刷新会话 flush privileges;