1. ultrasonic method: the fat cells are selectively destroyed by ultrasonic energy, and then the adipose tissue in the body is sucked away by negative pressure, which is divided into two types: in vivo ultrasonic and in vitro ultrasonic. At present, it is considered as a relatively safe method.

2. Electronic method: the adipose tissue is heated by the thermal effect generated by a high-frequency electric field with a certain intensity, which leads to the rupture of adipose cells and is beneficial to suction.

3. Negative pressure method: This is the earliest method of mechanical liposuction minus double chin. This technique uses negative pressure, special straws, suction tips and proper anesthesia to remove local fat. This method is suitable for systemic or local fat accumulation caused by various reasons.

4.* * * Vibration Method: Based on the principle of * * * vibration, under the control of computer fuzzy program, the straw generates mechanical * * * vibration waves with the same natural frequency as fat cells, which can selectively destroy fat cells, facilitate suction and effectively protect nerves and blood vessels.

5. Laser-assisted liposuction: Low-energy laser is used to liquefy adipose tissue to promote liposuction.