MP-23C·III electrical suction device is a new style suction device for medical use. It can meet most of the negative pressure requirements in operating rooms, wards and other departments in hospitals. It is used for taking out pus, blood, sputum and other thick liquid in human body. The machine adopts oil-free lubrication vacuum pump avoiding the pollution of oil mist, and the pump requires no daily maintenance and servicing. The liquid vessel placed directly on the mobile setup makes it easy to observe the liquid level in the vessel. Overflow protection device can prevent the liquid from flowing into the pump. Hand-operated switch and footstep-operated switch are connected in parallel for option. The complete machine works reliably, produces low level of noise. It is long in service life and reliable and safe in use.