Sludge dewatering device

The utility model provides a sludge dewatering device. The device comprises an evaporation device, a sludge recovery box and a collection device, the evaporation device comprises a treatment box and astirring piece; a feeding pipe is arranged on the top wall of the treatment box; the treatment box comprises an inner box body and an outer box body; the stirring part comprises a stirring motor; anoutput shaft of the stirring motor penetrates through a first stirring through hole in the top wall of the outer box body and a second stirring through hole in the top wall of the inner box body and is connected with a stirring shaft, a spiral stirring blade is arranged on the stirring shaft, and the collecting device comprises a first connecting pipe, a second connecting pipe, a connecting main pipe, a collecting box and a sucking pump. The sludge dewatering device has the advantages that the spiral heating pipe can evaporate water in sludge water, the water pump and the collecting cover arearranged to fully absorb ev