Sludge dewatering device for ecological management of water conservancy river channel

The utility model relates to the field of sludge dewatering equipment, in particular to a sludge dewatering device for ecological management of a water conservancy river channel. Which comprises a precipitation and purification device, a dehydration device and a drying device, and is characterized in that the precipitation and purification device comprises a vertically-arranged precipitation box, the top of the precipitation box is of a sealed structure, a vertically-arranged stirring motor is installed in the middle of the top of the precipitation box, and a dosing opening is formed in the top of the precipitation box and located in the side portion of the stirring motor; the stirring motor is connected with a connecting shaft, spiral blades are mounted on the connecting shaft, the bottom of the settling tank is connected with a first discharging pipe, and the bottom of the first discharging pipe is connected with a dewatering device; through precipitation purification, dehydration and drying, the dehydratio