第一步:登入

mysql -u root -p

第二步:查看加密规程

 select user,plugin from user where user='root';
 
 结果显示
 +------+-----------------------+
| user | plugin                |
+------+-----------------------+
| root | caching_sha2_password |
+------+-----------------------+

第三步:修改加密规则

ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER;

第四步:重修修改密码

复制ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '131556';

第五步:刷新

FLUSH PRIVILEGES;

出处：https://www.cnblogs.com/pythonywy/p/13625612.html