Autologous fat is a method of injecting self-cleaning fat particles obtained by suction into the defect of chin to make the recipient full and plastic. Compared with traditional methods such as total fat surgical transplantation, its postoperative survival rate has been greatly improved. This technique is simple to operate, with little tissue damage and no scar on the skin surface. Because there are no problems such as foreign body immune rejection and toxic substances absorbed by autologous tissue, it has become a better correction method and has a tendency to expand its application scope.