Filtering device

The utility model relates to the technical field of sewage treatment, in particular to a filtering device which comprises a filtering bin and a filtering assembly, the filtering assembly comprises a filtering plate, a water inlet, a water outlet, a shell, a screw machine, a threaded block, an air cylinder, a cleaning brush and a flushing unit, the threaded block is matched with the output end of the screw machine, and the air cylinder is fixedly connected with the threaded block. When the filter plate needs to be cleaned, sewage input is stopped, the filter plate slides into the shell, the air cylinder extends out, the cleaning brush moves downwards to make contact with the filter plate, the screw machine runs to drive the threaded block to move, the cleaning brush moves on the filter plate to wash, and cleaning is completed. Meanwhile, the washing unit continuously washes the washing brush and the filter plate, so that the cleaning effect is improved, the filter plate can be automatically cleaned, cleaning a