The invention provides a dredging conveyer. The dredging conveyer comprises a walking device, a dredging device, a feeding device, a swing device, a lifting device, a collecting device and a pumping device, wherein the walking device is used for driving the dredging conveyer to move in a water sump; the dredging device is used for dredging and collecting the deposit in the water sump; the feedingdevice is provided with a feeding end and a discharge end and used for lifting the deposit dredged and collected by the dredging device to the discharge end from the feeding end; the swing device is provided with a first end and a second end and used for realizing left and right swing of the dredging device; the lifting device is provided with a first end and a second end and used for lifting thefeeding device so as to drive the dredging device to realize lifting; the collecting device is provided with a feeding hole and used for receiving the deposit at the discharge end of the feeding device; and the pumping device is provided with a suction port and used for sucking the deposit received by the collecting device and conveying the deposit out. The dredging conveyer has the advantages ofsimple structure, safe and convenient use and high working reliability, can realize mechanical operation of dredging of the water sump, and is more practical.