Desilting device for water conservancy project

The invention relates to a hydraulic engineering desilting device, in particular to the field of hydraulic engineering. The suction assembly is arranged on the filter box, and the suction assembly is used for sucking impurities such as sludge in the river channel into the filter box; the filter plate is arranged in the filter box, the filter plate comprises a first-stage filter plate and a second-stage filter plate, the first-stage filter plate and the second-stage filter plate are arranged in the filter box at intervals, the first-stage filter plate is close to one side where impurities such as sludge enter the filter box, and the second-stage filter plate is close to one side where the impurities such as sludge enter the filter box. And the diameters of the filtering holes in the first-stage filtering plate are greater than those of the filtering holes in the second-stage filtering plate. The river channel desilting device has the effects that impurities and sludge are separated during river channel desilti