Urban underground round rainwater pipeline dredging device

The invention particularly relates to an urban underground round rainwater pipeline dredging device, solving the problem that cleaning of the existing rainwater pipeline wastes time and labor, and harms the bodies of constructors. The urban underground round rainwater pipeline dredging device is characterized in that flexible landing legs are arranged at the lower side of a rack, the upper end face of the rack is provided with a guiding slideway which is provided with a sliding trolley, hollow rotating shafts which are connected into a whole penetrate through the sliding trolley, the tail part of the connected hollow rotating shaft is provided with a high-pressure water supply pipe, a speed reducer and a motor are arranged on the sliding trolley, the middle part of the connected hollow rotating shaft is provided with a supporting disc, the circumferential surface of the supporting disc is provided with plastic idler wheels, the front end of the connected hollow rotating shaft is provided with a smashing device or a cleaning device, the side wall of the connected hollow rotating shaft is provided with a plurality of high pressure spraying heads, the smashing device comprises a smashing disc, the circumferential surface of the smashing disc is provided with plastic idler wheels I, the front end of the smashing disc is fixedly provided with smashing teeth, the cleaning device comprises a cleaning disc, and the circumferential surface of the cleaning disc is provided with plastic idler wheels II and cleaning hair brushes. The structure of the urban underground round rainwater pipeline dredging device has the advantages of simple structure, convenient operation and low cost.