Sludge dewatering machine

The invention relates to a sludge dewatering machine which comprises a machine frame and a feeder connected to the upper end of the machine frame, and further comprises an upper filter belt, a lower filter belt and a squeezing mechanism which are connected to the machine frame, the lower filter belt is arranged below the feeder, and the upper filter belt and the lower filter belt both wind the squeezing mechanism and move in the same direction in the squeezing mechanism. The squeezing mechanism comprises vacuum squeezing rollers and squeezing rollers which are alternately arranged, the vacuum squeezing rollers comprise the first vacuum squeezing roller, and the first vacuum squeezing roller and the squeezing rollers are slidably connected to the rack and can reciprocate in the horizontal direction along the rack. The sludge dewatering machine provided by the invention not only can effectively utilize space and occupies a small area, but also can realize quicker and more thorough solid-liquid separation of slu