Suspend liquid enters rotating drum through feeding pipe. The granules of solid phase speed up and sedimentate to the inner wall of rotating drum. Sedimentated granules are pushed by the vanes of screw conveyor from sedimentation zone to desiccation zone. Pellucid liquid overflows from the holes. In this way, the solid phase is separated from liquid phase continuously. This machine can be applied in the field of dehydration, concentration and classification defecation.