1. Send the pictures that need to be made into avatars on the mobile phone to the computer first.

2. Then open the Word document and insert the picture into the document.

3. Then click on the size column in the picture format and change the length and width of the picture to the appropriate size as needed.

4. After the change is completed, right-click the picture and click "Save as Picture" in the pop-up option.

5. Then log on to computer WeChat or webpage WeChat and click "File Transfer Assistant".

6. Send the modified picture to the mobile phone WeChat through the file transfer assistant, and you can change the avatar with the picture received by the mobile phone.