Filter tank for sewage treatment

The utility model relates to a filter tank, in particular to a filter tank for sewage treatment, which comprises a filter tank, and a primary filter screen drawer, a secondary filter screen drawer, anactivated carbon screen drawer and an ultrafiltration membrane filter screen drawer are arranged in the filter tank in a sliding manner from left to right. An anti-blocking device is rotationally arranged on the right side of each of the first-stage filter screen drawer, the second-stage filter screen drawer, the activated carbon screen drawer and the ultrafiltration membrane filter screen drawer, each anti-blocking device comprises a screw rod, the screw rods are rotationally arranged in the filter tank, the outer walls of the screw rods are in threaded connection with movable plates, and aplurality of brushes are arranged at the ends of the movable plates; according to the sewage treatment device disclosed by the utility model, sewage can be circularly filtered for multiple times, peculiar smells of the sewage