Circulating sewage treatment filter

The utility model relates to the technical field of sewage treatment, in particular to a circulating type sewage treatment filter which is convenient for cleaning the interior of a mesh cylinder, preventing the mesh cylinder from being blocked and improving the filtering effect. Comprising a base, a supporting frame, a motor, a filter cartridge, a plurality of sets of bolts, a left connecting cover, a right connecting cover, a plurality of sets of left clamping sleeves, a plurality of sets of net cartridges and a plurality of sets of right clamping sleeves, the top end of the base is fixedly connected with the bottom end of the supporting frame, the motor is fixedly installed at the front end of the supporting frame, the filter cartridge is rotatably installed in the supporting frame through a rotating shaft, and the front end of the filter cartridge is connected with the output end of the motor; openings are formed in the left end and the right end of the filter cartridge, the left connecting cover is detach