Jaw osteotomy is a procedure to improve the lower part of the face which is too wide and the jawline is not smooth by lifting the excessively wide jaw angle, treating the inward or outward thickening of the mandible, and making the face shape in accordance with the aesthetic standard. This surgery can bring certain surgical risks, as follows: 1. Mandibular fracture: generally mandibular ascending branch injury is common, and it has a lot to do with the doctor’s operation, but the fragility of the patient’s own bone will increase this risk, and it may need intermandibular fixation or other treatments, and generally it will not leave any serious after-effects, but the recovery time will be increased after the operation; 2. chin nerve injury: it is common that the patient’s lower lip sensation is numb after the operation The longest time can be up to half a year, which is caused by pulling the chin nerve during the operation, this situation can be recovered, patients do not need to worry about it; 3, bleeding: it is related to many factors, and the more rapid one is seen in the rupture of the facial artery or external carotid artery, but timely treatment will not lead to serious consequences after the operation; 4, the angle of the mandible is not smooth: it has a lot to do with the way of osteotomy, and it has a certain relationship with the doctor’s experience and his esthetic, mainly due to the straight line osteotomy in the angle area, which is the most important factor for patients to recover. It is mainly due to the straight line osteotomy in the angle area, resulting in the angle area and the mandibular body connection is not well articulated, which leads to the obvious protrusion of the mandibular body; 5, mandibular angle recurrence: some literature reports that there is regeneration of bone in the angle area in the long term after the operation, but generally will not be restored to the state before the operation, which is often related to the operation of the bone debris rinsed off; 6, others: including hematoma, infection, bilateral asymmetry, postoperative swelling, and mandibular neural tube injury resulting in bleeding and inferior alveolar sensation. injury leading to bleeding and abnormal sensation in the inferior alveolar canal.