The invention discloses a complete set of device for absorbing and removing river channel desilting sludge, and the complete set of device comprises a main motor, an anti-seismic seat, a composite oilcylinder assembly, a belt, an oil tank, a hydraulic component, a material pushing shaft, a hollow shaft, a bearing seat, an oil cooler, a secondary rotating drum, a housing assembly, a primary rotating drum, a feed pipe assembly, a flushing pipe, a secondary rotating drum transmission plate, a first stepped shaft, a primary rotating drum transmission plate, a mudguard, a bearing plate, a second stepped shaft, a tube plate and a plug. According to the invention, on-site absorbing and removing of the river channel desilting sludge can be carried out at a riverside, and the efficiency is high. According to the invention, the sludge is sorted by a two-stage rotating drum, the sludge is prevented from caking and falling by the plug, and the inner wall is cleaned regularly by a cleaning pipe, so that river channel desilting sludge is completed.