Facial plastic surgery is a general term for many plastic methods to improve facial contour. From the clinical point of view, the main factors affecting facial contour are hard tissue morphology and soft tissue structure. Among them, the mandibular angle and zygomatic bone are most obviously affected by hard tissue morphology, and the Chinese character face is caused by the hypertrophy and eversion of mandibular angle. This situation can be improved by grinding the mandibular angle. Intravenous anesthesia is used for mandibular angle grinding in hospital, and the operation speed is fast.