The invention discloses a pressurizing, heating and beating division type sludge dewatering device. The pressurizing, heating and beating division type sludge dewatering device comprises a sludge preheating tank, a piston type pressurizing, heating and sending tank, a beating diversion crawler belt, a dewatered sludge storage tank and a separated water collecting tank, wherein the sludge preheating tank is connected with the piston type pressurizing, heating and discharging tank through an batch type feeding and conveying device; during operation, a mechanical arm periodically pushes a piston to compress the sludge and sends the sludge to the beating diversion crawler belt, conical spike teeth are uniformly distributed on the steel crawler belt, the minimum gradual contraction seam is reserved between a steel plate above the crawler belt and the crawler belt, and the upward moving sludge is extruded to be further dewatered. On one hand, the number of times of circular dewatering is set according to different sludge types and the dewatering requirements, and the preset water content of the sludge is realized; on the other hand, water retention of the sludge is damaged due to dewatering through the device, and the device has good pretreatment significance in follow-up treatment.