The cosmetic surgery of the mandible must follow the scientific basis, combined with the patient cosmetic requirements and aesthetic objective law. Both due to the jaw angle is too large and caused by the lower 1/3 of the face is too wide, and due to the bite muscle hypertrophy and caused by the lower 1/3 of the face is too wide, and due to the jaw bone chin underdevelopment, and make the lower 1/3 of the face is too short or side view chin is too small, so must be considered according to the aesthetic appeal of different surgery. There are many surgical methods, specifically the following: 1.Excision method: remove the inner plate of the enlarged mandible, which can improve the jaw angle exostosis and hypertrophy, and improve the lateral view of the patient’s face. 3.Excision + Bone grinding method: This surgery method combines two common jaw angle removal methods perfectly, which can remove the enlarged jawbone; at the same time, the angles after bone cutting can be smoothed by bone grinding method, making the facial lines softer and more smooth. Patients need to choose the surgical method according to their actual situation, and should have a detailed discussion with the surgeon before surgery. After surgery, patients should take good care of themselves, such as avoiding touching water in the area to prevent infection, avoiding touching the area, and avoiding applying cosmetics to help them recover quickly.