Laser lipolysis can be divided into in vivo laser lipolysis and in vitro laser lipolysis. Laser lipolysis in vivo refers to the need to make a small incision in the skin and insert a laser fiber catheter before laser irradiation. The front end of fiber catheter is the release part of laser, and laser lipolysis in vitro is a method of penetrating skin irradiation and acting on subcutaneous fat layer. The specific selection method can be selected according to the specific situation of the patient and the actual situation of the liposuction site.