Generally speaking, melon face plastic surgery is more effective, and mandibular angle plastic surgery is generally chosen. Because the mandibular angle cosmetic surgery is through the oral route, there is no scar on the body surface after surgery. The time is short, basically it only takes about 60 minutes from the beginning to the completion of the operation, and the postoperative edema is light and the recovery is fast. Different osteotomy methods are adopted according to different face types and mandibular angle types, and the osteotomy is accurate, and the shape of melon seeds changes significantly.