The mandibular angle is composed of mandibular branches and mandibular body, which is symmetrical (normal) in the face. Usually, if the angle is too large, it will affect the appearance and need plastic surgery. Mandibular angle surgery is one of the means of plastic surgery to change people's face, including mandibular angle shaping by grinding bone, mandibular angle shaping by osteotomy or tangent osteotomy, and mandibular angle shaping by long curve. The postoperative effect is very good, and the effect is obvious after postoperative recovery.