Tik Tok platform does not provide the function of retrieving historical avatars. Once the avatar is changed, the avatars in the short videos and comments sent before will be replaced with new avatars. On Tik Tok's personal homepage, clicking on the avatar can only change the avatar, and there is no other function to retrieve the historical avatar. Before changing the avatar, please back up the original avatar file in advance so that it can be easily restored when necessary.