Air cleaning screen filtering device

The utility model discloses an air cleaning screen filtering device which comprises an installation support, a roller filter screen and a cleaning assembly, connecting flanges for sealing the roller filter screen are arranged at the two ends of the roller filter screen, a hole is formed in the middle of one connecting flange, the connecting flange extends outwards and is movably sleeved with a water outlet, and the water outlet is fixed to the installation support through a fixing pressing piece. The middle of the other connecting flange is movably arranged on the other mounting bracket, so that the roller filter screen can roll between the two mounting brackets, and a motor connecting plate for supporting a servo motor is fixedly mounted at the top of each mounting bracket. The top of the roller filter screen is located above the water surface through buoyancy of the buoy, one side of the roller filter screen moves to the position above the water surface from the position below the water surface in the rotat