The jaw angle is located in one of the most important positions of our face, and it directly affects our overall facial shape. Some people always think that their chin is not perfect, such as too prominent or collapsed. This can be effectively improved through jaw angle cosmetic surgery. Hypoplasia of the jaw may also cause problems with the alignment of our teeth. The method of cosmetic surgery is relatively simple and can be divided into three methods: extra-oral approach, intra-oral approach and combined approach. Bone removal methods can be divided into several types of jaw angle osteotomy, external plate splitting and jaw angle grinding. The jaw angle osteotomy process is better for our jaw angle lifting effect, and for our face narrowing effect in general, the outer plate splitting method is better for face narrowing effect, but for jaw angle lifting effect is general. The jaw angle grinding technique combined with bone cutting surgery can both remove the outer plate and lift the jaw angle, and can remove the bite muscle as needed, and those with short jaws can also use their own bones to augment the chin. In this way, an ideal cosmetic surgery treatment result can be achieved.