The main purpose of debulking smile plastic surgery is to correct the debulking smile, improve the temperament and bring better facial aesthetics and harmony. Surgical methods vary from person to person. If the patient is a mild patient, not accompanied by maxillary protrusion, an intraoral incision can be made to loosen and disconnect the bilateral upper lip square muscle, descending septum muscle, and lengthen the upper lip tie. If the combination of the upper lip is too short, an external incision can be made, and at the same time, the middle of the mouth can be extended and the gingival smile can be corrected. In severe cases with maxillary protrusion, maxillary Lefort I osteotomy can be performed at the Oral and Maxillofacial Surgery Department first. There are certain risks that may arise if the surgery is performed improperly or if the procedure is not followed. The surgical risks are mainly in the following aspects: 1. Bleeding: systemic diseases or coagulation disorders need to be excluded before surgery, and surgical trauma should be minimized during surgery to reduce the bleeding to the smallest controllable range; 2. Pain: generally within the range of the patient’s ability to tolerate, and if the patient is more sensitive to the pain, or even difficult to tolerate, he/she may be given oral pain medication under the guidance of the surgeon; 3. Infection: infection is generally low, and patients may be infected after surgery. The risk of infection is generally low, patients can follow the doctor’s instructions to use antibiotics to prevent infection, such as postoperative care is not appropriate infection, need to seek medical treatment as soon as possible; 4, poor postoperative results: due to the relationship between the incision or suture may lead to poor postoperative results, the patient can consult the surgeon to deal with; 5, numbness of the upper lip: damage to the sensory nerves (infraorbital nerve) or the emergence of the upper lip keloid scar hyperplasia.