Mandibular angle plastic surgery is to choose a suitable surgical plan according to everyone's detailed situation, stop cutting off the hypertrophic mandibular margin and part of the masseter muscle, and perform the operation in the mouth without leaving any scars after operation. In addition, after the operation is completed, the facial edema is added with elastic bandage, so that the edema disappears within 1-2 weeks, and ice compress can be used appropriately to reduce swelling faster, which can effectively achieve the expected therapeutic effect. It must be audited by experts from the Provincial Health Department. Public hospitals are generally required to be Grade-A hospitals with powerful supporting medical facilities such as anesthesiology department and resuscitation room.