1, the official website to download free installation: https://dev.mysql.com/downloads/mysql/
2, unzip the downloaded file, the new data folder and file my.ini 
3, open my.ini file, paste the following code and save
[mysql] # mysql client set the default character set default -CHARACTER-SET = UTF8 [mysqld] # 3306 port disposed Port = 3306 # mysql installation directory setting the basedir = C: \ Program Files \ MYSQL Based \ mysql5.7 # Set mysql data storage directory database DATADIR = C: \ Program Files \ MYSQL Based \ mysql5.7 \ data # maximum number of connections max_connections = 200 is # character set used by the server defaults to the 8-bit coded character set latin1 character -set-Server = utf8 default storage engine that will be used when creating a new table # default -storage-engine = INNODB skip the permissions check during their login # skip_grant_tables
4, Run as administrator cmd.exe, and switch to the mysql installation directory under
5, initialization: mysqld -initialize-insecure
6. Installation: mysqld install
7, start the service: net start mysql
8、修改密码：update user set authentication_string=password('sa') where user='root';
9, Login: mysql -u root -p
enter password
After the success of the my.ini file skip-grant-tables deleted and you're done.
10, shut down the service: net stop mysql