With the development of society, people have higher and higher requirements for quality of life, especially for aesthetics. In recent years, orthognathic surgery has also developed by leaps and bounds. The so-called orthognathic surgery is a combination of modern surgery and orthodontic treatment techniques, and the application of new special surgical instruments to correct bony dental and maxillofacial deformities. Orthognathic orthognathic surgery is the treatment of orthognathic or maxillofacial deformities, which are caused by congenital factors, such as heredity, or acquired factors, such as bad habits, resulting in abnormal occlusal relationship, manifested as open and closed, and appearance manifested as abnormal facial morphology. It not only affects the chewing function, but also has a greater impact on the face shape, which is manifested as crescent face, geodesic, crooked chin, bird’s mouth deformity (small jaw deformity), and Chinese face. The current treatment is mainly through orthognathic surgery, which sometimes needs to be combined with orthodontic treatment to achieve a good aesthetic and functional improvement. The general process of orthognathic surgery is: 1) orthodontic treatment to align the teeth before surgery; 2) then after professional projection measurement and analysis, surgical guides are made; 3) during surgery, the jaw position and bite relationship are adjusted through intraoral incisions; 4) after surgery, orthodontic adjustment of the bite relationship continues. In this way, the patient’s bite and appearance are greatly improved. Orthognathic surgery is currently a more mature surgical treatment, and generally adopts an intraoral incision, so that the face and neck do not leave a scar, but because orthognathic surgery is difficult to operate, and requires high medical conditions and doctor’s level, as well as the cooperation of various specialties, the surgery has certain risks, and in recent years there have been reports of injuries caused to patients due to surgery in many places, so patients need to choose carefully.