Screw vacuum pump for tail gas adsorption

The utility model relates to the technical field of vacuum pumps, and discloses a screw vacuum pump for tail gas adsorption, which comprises a screw vacuum pump body, and the screw vacuum pump body is mounted on a supporting seat through supporting legs; an air inlet and an air outlet are formed in the screw vacuum pump body; the device further comprises a filtering assembly. The filtering assembly is communicated with the air inlet; the filter assembly comprises two primary filters and a secondary filter; each primary filter comprises a filter box, a filter screen, an inlet pipe and an outlet pipe; the filter box is cylindrical and comprises a front box cover and a rear box body which are connected through a flange; the filtering assembly can clean dust in the gas, so that the dust is prevented from entering the screw vacuum pump body, and the screw vacuum pump is prevented from frequent fault shutdown; the filter screen of the filter assembly is convenient and fast to clean and high in maintenance efficienc