There is no need to correct the slight case, because the reverse jaw surgery is a major operation. The degree of malocclusion of upper and lower jaws is greater than that of protrusion of upper and lower jaws. The main surgical methods are intraoral incision, osteotomy to advance the retracted bone tissue, or osteotomy to retreat the protruding bone tissue, so as to correct the malocclusion. This method may damage the alveolar radian and remove the teeth that hinder osteotomy. It belongs to the fourth-level project in the classification of medical beauty projects of the Ministry of Health and should be carried out in the plastic surgery of the third-level plastic surgery hospital or the third-level general hospital.