Maxillary angle plastic surgery adopts internal approach, so there is no scar after operation. Different osteotomy methods are adopted according to different face types and types of mandibular angles, so that the osteotomy is accurate, and the mandibular angle and the mandibular angle can be osteotomy, which has a special improvement effect on the big face, long face and square face caused by the oversized mandible. The whole process of mandibular angle surgery only takes 60 minutes, which is minimally invasive and fully meets the requirements of minimally invasive surgery, and the postoperative recovery is fast.