DFX-23A portable electrical sputum suction device can be used for suctioning sputum and other thick secretions in hospitals, and may also be used for fist aid in the household. The machine adopts oil-free lubricating pump, avoiding the pollution of oil mist. The pump requires no daily maintenance and servicing. The overflow protection device in the machine prevents liquids from flowing into the pump. The machine is characterized with small dimensions, light weight and high mobility. (Note: DFX-23A·I adopts full plastics shell.)