Municipal water supply and drainage sewage pretreatment device

The utility model discloses a municipal water supply and drainage sewage pretreatment device which comprises a box body, a round hole is formed in the middle of the top of the box body, a rectangular hole is formed in the top of one side of the box body, a plurality of drainage holes are formed in the bottom of one side of the box body, and an arc plate is fixedly welded to the top of the side, close to the rectangular hole, of the box body. A bottom box is fixedly welded to the middle of the side, close to the rectangular hole, of the box body, and a fishing box is fixedly welded to the side, away from the box body, of the bottom box. By arranging the motor, the roller, the rotating rod, the cleaning rod and the like, sewage in the box body is located at the height of the rotating rod, floating objects in the sewage float into the bottom box through the rectangular opening in one side of the box body, the motor drives the motor shaft to rotate, and the motor shaft rotates to drive the roller to rotate; rolle