Mandibular angle osteotomy made an incision in the oral mucosa, first designed the surgical osteotomy line, then directly saw the outline of the bone, and used a surgical saw to form a long curve one-time osteotomy from the upper part of the angled mandibular angle to the lower part of the vertical line of the corner of the mouth. This new surgical method has a long range of osteotomy, which eases the postoperative mandibular curve, and the effect is soft and natural, making the whole face look smaller. In this way, no matter from the side or the front, you can shrink your face and turn it into a melon face.