Shengjiaxin operation is a long arc operation of mandibular angle, which is safe and effective. Mandibular angle resection is to completely separate the skin tissue from the bone at the operation site, so that it will not harm the skin tissue and nerve blood vessels during the operation. However, the operation requires general anesthesia to make the patient feel better. After the operation, our recovery work will be faster, and the impact on our normal life will be less.