1.Resuscitation room monitoring: After orthognathic surgery, patients usually need to be monitored in the resuscitation room for about 4 hours to return to the ward. 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 drying of the pharynx and causing painful discomfort. 2, the treatment of pain: postoperative pain is not serious, there may be pain and discomfort in the throat, generally postoperative with pain pump continuous drug administration for 2-3 days can greatly alleviate postoperative pain. 3, the treatment of swelling: general postoperative routine application of dexamethasone 3 days will effectively reduce postoperative swelling, 48 hours after surgery with ice bags cold compress surgical site can also effectively reduce postoperative swelling, elevate the head of the bed 30 ~ 40 degrees, so that patients take a semi-recumbent position to reduce facial swelling and bleeding, but also to facilitate the discharge of intraoral secretions. 4, nausea and vomiting treatment: postoperative nausea and vomiting in a small number of patients due to the reaction to general anesthetic drugs, this time should be taken to the lateral position, to facilitate the outflow of vomit can prevent accidental aspiration, bedside always have a negative pressure saliva suction device can be timely suction of vomit in the oral and nasal cavities, such as intermaxillary traction, bedside should be prepared wire scissors, vomiting should cut the ligature wire or elastic traction of the rubber band to prevent asphyxiation. 5.Treatment of orofacial injury and dry crack: Rub the orofacial lip, corner burn or traction injury with gentamycin ointment to keep the orofacial lip clean and moist to avoid infection and promote healing. 6. Maintenance of oral hygiene: keep the oral cavity clean, suck out the secretions in the mouth in a timely manner, and avoid the wound with gentle suction movements. Apply saline for oral rinsing continuously for 5 days after surgery, twice a day, and apply mouthwash by itself several times a day. Keeping the oral hygiene clean is beneficial to the good healing of the postoperative wound. 7.Postoperative diet: postoperative liquid diet, generally not under the nasal feeding tube, advocate a small number of meals, mainly high-calorie, high-protein diet, about 200ml each time, appropriate temperature, comprehensive nutrition, sweet and salty with. 8. Give antibiotics, glucocorticoids and hemostatic drugs after surgery, and pay attention to the reaction after medication. 9.Patients should get out of bed or move around in bed as early as possible according to their physical strength to facilitate recovery. 10.The negative pressure drainage tube in the mandibular angle area was removed on the second day after surgery, and the normal occlusal relationship was established by intermaxillary traction wearing a jaw plate, and the intra-oral sutures were removed 7 days after surgery.