I. Preoperative 1, patients admitted to the hospital for general anesthesia surgery, the need for a comprehensive physical examination to evaluate the patient’s current physical condition can undertake general anesthesia surgery. The examination includes: blood test, blood type, blood coagulation, biochemical routine, HIV, urine routine, electrocardiogram, chest X-ray and so on. Abnormalities in the above checkups must be reviewed before surgery, or examined in a foreign hospital or consult with a doctor, and surgery can only be carried out after the abnormal indexes are basically normal. 2.Preoperative imaging examinations, including head and face CT, X-ray examination, through the imaging examination, to locate the specific position of the patient’s important anatomical structures, measure the specific value, minimize the risk of surgery. If there is ectopic obvious important blood vessels and nerves, and the intraoperative risk is higher, suspend the surgery if necessary. 3.Pre-operative VTO (head shadow prediction analysis), according to the patient’s specific facial morphology, can determine the distance of the bone segments moved during the operation, to guide the operation, to avoid moving the bone segments according to the subjective assumptions during the operation caused by bone necrosis or not in place. Second, intraoperative 1, the application of controlled hypotensive anesthesia during surgery, blood pressure control at about 90/50mmhg, can significantly reduce the amount of intraoperative bleeding, reduce the duration of the operation, and increase the safety of the operation. 2.Patients whose operation time is expected to be more than 3 hours need to be put under urinary catheter to avoid excessive holding and filling of bladder. 3.Intraoperative application of transnasal tracheal intubation anesthesia, pharyngeal placement of pharyngeal gauze, to ensure the safe and smooth operation. 4.Application of hemostatic powder, for the extensive blood seepage of cancellous bone bone trauma during the operation, gelatin sponge and hemostatic powder can be used jointly to press on the surface of cancellous bone, and the active hemostatic function can effectively stop bleeding, make the surgical field clear, and reduce the operation time. 5, the arterial clip can be used in the operation when the important blood vessels are partially or completely disconnected, compact size, easy to hold can immediately stop bleeding. It can be withdrawn after the blood vessel is sutured. 6, a variety of special protection hook, grinding head crack drill protective cover and cold light source is equal to the use of specific surgical parts of the operation, can clearly expose the operating field and can greatly reduce the risk of damage to important anatomical structures. 7.After the operation is completed, the number of gauze and gauze must be strictly counted and checked with the hand-washing nurse and the roving nurse in a timely manner. Postoperative 1, the day after surgery, the patient with tracheal tube back to the recovery room, to be anesthesiologists to check the patient evaluation of the general condition of the patient allows, in the recovery room to remove the tracheal tube, after extraction of the patient to stay in the recovery room until full recovery, the whole cardiovascular and oximetry monitoring, and is equipped with a variety of first aid equipment and facilities, such as tracheotomy bag. 2.Apply antimicrobial drugs for 5-7 days after surgery, and effectively replace the antimicrobial drugs according to the results of the patient’s oral bacterial culture. 3. Clean the patient’s mouth every day after the operation, make sure there is no obvious accumulation of fluid in the operation area, and check the healing of the wound inside and outside the mouth. 4. Diet: 1-5 days after the operation is liquid diet, food content including water, fruit juice, milk, nutritional meals, protein powder, etc., 6-14 days after the operation is semi-liquid diet, 2 weeks after the start of soft food. From the beginning of the postoperative period, mouthwash should be used to clean and soak the mouth after eating every day to keep the mouth clean. 5, 2 weeks after surgery, the swollen parts of the surgical area using gauze or gauze ball, tape or elastic bandage pressure bandage, can compress the surgical area to reduce exudate, limit the exudate site, accelerate the swelling to subside and absorb. 2 weeks after the patient can apply elastic headgear to continue the facial pressure bandage, to accelerate the swelling to subside and have the role of facial contouring.