Assembly type lake water filtering device supported by sewage submersible pump

The invention discloses an assembly type sewage submersible pump supporting lake water filtering device which comprises an outer box body and an inner box body, micropores are distributed in the outer box body, and the inner box body is arranged in the outer box body to conduct double-layer filtering on lake water. The inner box body and the outer box body respectively comprise a three-dimensional frame, a top plate and a side plate, the top plate and the side plate are detachably installed on the top face and the side face of the three-dimensional frame and provided with micropores, holes for a water outlet pipe of the sewage submersible pump to penetrate through are formed in the top plate of the inner box body and the top plate of the outer box body, and sealing structures are arranged between the hole edges of the holes and the water outlet pipe. Large-diameter particles and garbage in lake water can be filtered in two layers and enter the sewage submersible pump, and it is guaranteed that water pumped by