At present, there are two kinds of mandibular angle plastic surgery: one is mainly subtraction, including mandibular angle osteotomy, mandibular angle long arc osteotomy, mental wedge osteotomy and mandibular outer plate grinding and splitting. All of them are related to mandibular angle subtraction surgery; There is another kind of people that we are seeing more and more in clinic now. The patient complained that the shape of mandibular angle area was not ideal, including congenital and partial postoperative. Then we may make some supplements for these patients, such as some operations such as mandibular expansion. Usually we can choose some materials, including MEDPOR, including some craniofacial materials, to fill the mandibular angle area. There are also some reports abroad. For example, the mandibular angle area is unwilling to be supported and expanded by a holiday body. We can also use hyaluronic acid with higher molecular weight to reshape the mandibular contour. Generally speaking, mandibular angle surgery mainly includes the above two situations.