The chin is an important part of the facial contour beauty, “chin beauty lies in the chin”, round and slightly forward chin is a feature of beauty. The receding and short chin often gives people a feeling of weakness, stupidity and old age, and the soft tissue volume of the chin gradually decreases with age, and the long-term contraction movement of the chin muscle produces wrinkles like “walnut skin”, which affects the beauty. Chin augmentation surgery has prosthesis implantation, filler injection and fat filling surgery. First, the chin part of the rules of the upper boundary of the chin is the chin-lip groove, both sides of the boundary for the corner of the mouth of the vertical line, under the lower edge of the lower jaw as the boundary. The aesthetic subunits of the chin are: the middle chin area, the side chin area, the chin-labial fold area and the bottom chin area. Second, autologous fat transplantation (a) transplantation method The total amount of chin fat filling is 2 to 14mL, with an average of 5mL. Site of extraction: inner and outer thighs and lower abdomen. Extraction method: After local swelling anesthesia, the fat was slowly extracted with a 20mL syringe connected to a 1.5mm diameter liposuction needle under negative pressure. Fat purification: by static sedimentation method, the fat tissue was repeatedly washed with cold saline at 4℃, then centrifuged at 1000r/min for 3 minutes and prepared for use. The chin injection site was selected slightly medial to the pupillary dip line at the mandibular rim. Anesthetize with 2% lidocaine for chin nerve block or local infiltration anesthesia, use a 1mL syringe with a 1.2mm diameter needle to enter the needle from the puncture point, and after no blood return, slowly withdraw the needle while injecting evenly into the chin, with the injection level being the subcutaneous layer and the upper periosteum layer; after the injection, gently press to shape. (B) chin fat injection points 1, the beauty of the chin lies in the moderate upturn, granular fat can make the flat, shrunken, short chin become full and full, but also can make the length of the face more in line with aesthetic standards. 2, due to the characteristics of soft fat particles and high absorption rate, fat injection chin augmentation requires multiple injections to achieve the effect of contour shaping, and for those who have high expectations, they should be carefully communicated and informed before surgery. 3, for serious small jaw deformity and severe jaw recession, the implantation of jaw prosthesis is more effective.