Chin, also known as mandible, is short and short, which is called micrognathia in medicine. It is caused by genetic or endocrine disorders, inflammation, trauma and other factors. From the aesthetic point of view, the harmonious relationship between nose, lips and jaw is one of the important signs of beauty. A normal or upturned chin is regarded not only as a symbol of beauty, but also as a symbol of wisdom and charm, otherwise it will be regarded as a dull and cowardly character. If the jaw is underdeveloped, it will make the face look like a "bird face", which will naturally make people feel uncomfortable. This kind of chin can be used for chin augmentation surgery. Chin augmentation is to raise or slightly raise the chin with some fillers. Now the commonly used fillers are autogenous bone, cartilage or medical solid silicone rubber. Among them, silicone rubber is the most commonly used because of its convenient source, easy modeling after carving and good biocompatibility. According to the shape and retraction of the chin, you can choose to carve the shape of silicone rubber and implant it. The incisions of chin augmentation cosmetic surgery, including oral incision and oral incision, are all selected in the gingival sulcus of the lower lip, and there is no surgical trace from the outside. The most suitable chin augmentation cosmetic surgery for young men and women, commonly used. The gingival sulcus of the lower lip was cut 1.5-2 cm, and the mandibular periosteum was stripped to form a pocket, the depth of which was not more than the lower edge of the mandible, and then the sterilized filler was implanted and fixed, and the whole operation was completed. Attention should be paid to aseptic kneading during operation. The cavity is close to the size of the implant, bilateral symmetry, complete hemostasis and good postoperative activity. With the external incision method, an arc incision of about 2-2.5cm was made at the lower part of the mandible, the muscle layer reached the periosteum of the mandible respectively, and the filler was implanted into the cavity respectively, and the incision trace was not obvious after operation. Due to the age problem, there is a fat bag in the lower jaw when the jaw is adducted, forming a "double chin". The fat in the fat bag can be turned over by surgery and transferred to the back of the mandible, which not only eliminates the double chin, but also increases the protrusion of the mandible, making the mandible more beautiful.