Multi-stage air-cooled high-pressure-difference roots pump

The utility model discloses a multistage air-cooled type high pressure difference roots pump, which relates to the vacuum pump field, and comprises a base plate, the upper surface of the base plate is symmetrically provided with pump bodies, a cross-shaped air suction pipe is arranged between the two groups of pump bodies, two sides of the cross-shaped air suction pipe are respectively communicated and connected with the middle parts of the mutually close sides of the pump bodies; a first electrostatic adsorption plate and a second electrostatic adsorption plate are installed on the two sides of the inner walls of the two ends of an inner cavity of the cross-shaped air suction pipe correspondingly and arranged in a staggered mode. The multistage air-cooled high-pressure-difference roots pump solves the problems that in the using process of an existing multistage air-cooled high-pressure-difference roots pump, the moisture content of gas sucked into a pump body cannot be reduced, meanwhile, the gas contains a