Filter screen of air purifier

The utility model discloses a filter screen of an air purifier. Rectangular frame, a plurality of uniformly distributed reticular plates are vertically arranged on the inner side of the rectangular frame; the front sides of the plurality of reticular plates are fixedly connected with filter cotton with a rhombus structure; rotating shafts are fixedly connected to the centers of the upper and lowerends of the reticular plate; the ends, away from the net-shaped plate, of the two rotating shafts are rotationally connected with the inner side of the rectangular frame through rolling bearings. A cavity is formed in the lower end of the rectangular frame, the rotating shaft located at the lower end of the net-shaped plate penetrates through the rolling bearing and is fixedly connected with a gear, a rack rod is transversely arranged in the cavity and engaged with the gear, one end of the rack rod is fixedly connected with a transmission rod, and the end, away from the rack rod, of the transmission rod penetrates th