Efficient hydraulic engineering desilting device

The efficient hydraulic engineering desilting device comprises a supporting plate, mounting frames are fixed to the two sides of the top of the supporting plate, a movable plate is slidably connected between the two mounting frames in a lifting mode, a driving assembly is arranged between the supporting plate and the tops of the mounting frames, and a desilting assembly is installed on the movable plate; the desilting assembly comprises a rotating shaft rotationally connected to the middle of the movable plate, a spiral blade is fixed to the rotating shaft, water permeable holes are formed in the periphery of the lower portion of the rotating shaft, the top end of the rotating shaft extends to the position above the movable plate and communicates with a water inlet pipe through a rotating connector, and a driving motor and a sludge pump are fixed to the two sides of the top of the movable plate. An output shaft of the driving motor extends to the position below the movable plate and is fixedly provided with a