Yuanhuai rotary vane vacuum pump is one of the basic equipment for pumping air. The pump is a two-stage direct connection structure. Its working performance is composed of high-pressure stage and low-pressure stage. Its suction port is connected with vacuum equipment. Inhale and discharge a large amount of the container during operation. When the equipment obtains vacuum, the exhaust valve of the high-pressure stage will be closed, and the gas inhaled by the high-pressure stage will be transferred to the second stage, and a certain vacuum can be obtained through the second-stage suction and discharge of the vacuum equipment. Yuanhuai bipolar rotary vane vacuum pump, high speed, small shape, compact structure, easy fluidity and work, specially adopts metal scraper, suitable for backing pump of diffusion pump, matching and use room of precision instruments.