As an important structure of the face, the chin has become more and more important in facial aesthetics. The chin has distinctive facial features and personality characteristics and occupies a very important position in the facial contour, whether frontal or lateral, the shape of the chin has an extremely important impact on the overall image of the face. The charm of the symbol: on the contrary, is a reflection of weakness, indecisiveness. The chin shape has distinctive personality characteristics and is an important cosmetic unit of the face. The incidence of chin deformity is higher in oriental people, mainly manifesting as short chin recession, which can exist simultaneously or separately with small jaw deformity, mandibular facial hypoplasia syndrome, mandibular angle hypertrophy, etc., and can also be accompanied or not accompanied by occlusal abnormalities. Definition: Small chin deformity refers to the abnormal appearance of the lower 1/3 of the face and the receding deformity of the chin due to bone dysplasia at the fusion. Treatment methods: 1. chin augmentation with prosthesis 2. chin augmentation with autologous bone graft 3. horizontal osteotomy chin augmentation