DFX-23D·II electrical suction device is a new style mobile suction unit for medical use. It is fit for suctioning pus, blood, sputum and other thick liquid in human body. It adopts double piston oil-free lubricating vacuum pump, avoiding the pollution of oil mist. The pump requires no daily maintenance and servicing. The overflow protection device in the machine may prevent liquid from flowing into the pump. Hand-operated switch and footstep-operated switch are connected in parallel for option. The complete machine works stably and produces a low level of noise. It can be easily operated and is reliable and safe in use.