Liposuction is very common now, that is, it is a method to absorb local excessive fat swelling or fat hyperplasia. The commonly used liposuction method was to make a small incision in the skin, and then suck out the fat through the suction tube and liposuction tube after injecting the swelling liquid. Of course, with the development of modern science and technology, there are also new instruments to assist liposuction. At present, a commonly used method called auxiliary laser is optical fiber lipolysis, which is an improved method of liposuction before operation. Laser fiber can be inserted through local incision, and then the fat cells in local skin are crushed through the fiber, and then the broken fat cells are sucked out. The recovery after laser liposuction is faster than traditional liposuction, and the postoperative complications are relatively reduced. However, if it is not handled properly, it may also lead to skin necrosis. Others include ultrasound or frozen fat dissolution. In the later application of these new technologies, we must pay more attention to their indications and the safety of surgical operation.