Sediment dredging device for drainage pipe network

A sediment dredging device for a drainage pipe network comprises a traction rod, a mud cutting unit and a supporting ring, the traction rod is located on the central axis of the supporting ring, the mud cutting unit is located in the supporting ring and composed of a plurality of mud cutting pieces, the mud cutting pieces are annularly distributed, one end of each mud cutting piece is fixedly connected with the traction rod, and the other end of each mud cutting piece is fixedly connected with the supporting ring. The other end of the traction rod is fixedly connected with the supporting ring, and traction devices are arranged at two ends of the traction rod. In the traction process of the device, sediments are broken and segmented through the mud cutting unit and the supporting ring, and after the sediments are loosened, the pipeline dredging vehicle and the high-pressure washing vehicle are adopted for dredging, so that the problem that hard sediments are not easy to clean is solved. 一种用于排水管网的沉积物清淤装置，包括牵引杆、