Commonly used methods include tumescent negative pressure liposuction, ultrasonic liposuction, electronic liposuction, laser liposuction and hydraulic liposuction. 1. tumescent negative pressure liposuction is less bleeding, easy to master, large suction, safe and reliable. It is one of the main liposuction methods at present. Mainly suitable for abdomen, thighs and other parts with high suction. 2. Ultrasonic liposuction is to suck out the fat with a negative pressure aspirator after ultrasonic emulsification. Its advantages are labor-saving, less bleeding and no serious complications, while its disadvantages are low efficiency, time-consuming and less aspiration. 3. Electronic liposuction uses electric energy to decompose liquefied fat, and then sucks it out with a negative pressure aspirator. Its advantages are less bleeding, quick recovery of skin elasticity and neat appearance. The disadvantage is low efficiency. 4. Laser lipolysis is to use special laser energy to introduce fat cells into specific parts of adipose tissue through ultra-fine optical fibers, and then take them out of the body with real-time low suction through thin tubes, or choose not to take them out and be absorbed by the body through metabolism. It has a good effect on facial liposuction. 5. The hydraulic liposuction body shaping system is based on the precise spiral water jet, which selectively separates fat cells by precisely acting on the target tissue through the pressurized water flow. Hydrodynamic liposuction technology will not cause damage to blood vessels and nerves, and has obvious advantages of rapid treatment, obvious effect and greatly reduced risk. In the working mode, hydrodynamic fat decomposition and recovery are carried out simultaneously, and the extracted fat can be used for fat transplantation.