Sludge filter capable of realizing multi-level magnetization filtration

The utility model discloses a sludge filter for multi-level magnetization filtration, which comprises a sludge filter body, the water outlet end of the sludge filter body is fixedly connected with a cylinder, the inner wall of the cylinder is fixedly connected with a filling layer, and a plurality of central pipes are fixedly embedded in the filling layer. The outer surfaces of the plurality of central pipes are fixedly connected with a plurality of shielding shells, the interiors of the plurality of shielding shells are fixedly connected with magnets, and the magnets are attached to the outer walls of the central pipes. According to the sewage treatment device, the central pipe, the magnet, the shielding shell, the filling layer, the connecting pipe and the filter element are arranged, so that sewage subjected to solid-liquid separation can be magnetized, bacteria in the sewage can be killed, meanwhile, water can be activated, needle-shaped crystals of scaling substances such as calcium and magnesium in the