TortoiseGit official download address: https://tortoisegit.org/download/ . There are Chinese language packs, you can choose to download and install
The steps to configure Putty key for SSH access without account and password are as follows:
1. In the bin directory of the TortoiseGit installation directory, open the puttygen program, and click Generate to generate the Key.
2. Click Save private key to save the key.
3. Copy the generated Key, enter GitLab--Profile Settings--SSH Keys, click Add SSH Keys, copy the copied content to the Key text box, click Title to automatically generate text, and finally click Add key.
3. Open the pageant program in the bin directory, click Add Key, import the key file saved in step 2, and click Close to close the dialog box.
The configuration is complete, and then connect to GitLab through TortoiseGit, and you do not need to enter the account password again.
The above works fine with GitLab Community Edition 8.5.5 and TortoiseGit-2.1.0.0-64bit.