Key points of postoperative care for orthognathic patients: 1. Patients usually need to be monitored overnight in the resuscitation room after orthognathic surgery and return to the ward the next day. Cardiac monitoring is used in the resuscitation room to closely observe vital signs, keep the airway open, and aspirate nasal and oral secretions in a timely manner. Because the patient’s nasal mucosa was swollen and could not be ventilated, only mouth breathing could be used. Two layers of wet gauze were applied to loosely cover the patient’s mouth and nose so that the patient could inhale moist air to avoid dryness of the pharynx, which could cause painful discomfort. Cold compresses with ice bags on the surgical site within 24 hours after surgery can effectively reduce postoperative edema. 2, pain management: general postoperative with pain pump continuous drug administration for 2-3 days can greatly relieve postoperative pain. When the analgesic effect of individual patients is not good, the drug can be replaced in time and oral or intravenous drip can be used to effectively control pain. 3. Treatment of nausea and vomiting: intermittent gastrointestinal decompression, aspiration of blood and gastric contents accumulated in the stomach, appropriate antiemetic drugs, such as intermaxillary traction, bedside wire cutters should be prepared, and the ligature wire or rubber band of elastic traction should be cut when vomiting to prevent asphyxia. 4. Elevate the head of the bed 30 degrees-40 degrees, so that the patient is in a semi-recumbent position to reduce facial swelling and bleeding, to facilitate the discharge of intra-oral secretions, and to prepare a suction device at the bedside. 5. Give nebulized inhalation for 5 days, twice a day, to dilute sputum and reduce pharyngeal pain and laryngeal edema. 6.Use antibiotic eye ointment to rub the lips and corners of the mouth burned or stretched to keep the lips clean and moist to avoid infection and promote healing. 7.Keep the oral cavity clean, suck out the secretions in the mouth in a timely manner, and be gentle with the suction action to avoid the wound. Oral rinsing can be performed continuously for 3-5 days after surgery, twice a day. 8. Keep the gastric tube and nasal feeding for 5 days. Advocate a small number of meals, mainly high-calorie, high-protein diet, about 200ml each time, with appropriate temperature, comprehensive nutrition, sweet and salty. 9.Give antibiotics, glucocorticoids and hemostatic drugs after surgery, and pay attention to the reaction after medication. 10.Patients should get out of bed or move around in bed as early as possible according to their physical strength to facilitate recovery.