NOVELTY - Machine comprises a box and a filter. The multiple filters are set along length direction of the box. A box space between the filters is formed into a filter cavity section. A waste water inlet is opened on the box of the first filter cavity section. A filtrate outlet is opened at the bottom of the box on the last filter cavity section. The filter comprises a roller, a filter screen, a filter screen frame, a side plate, a discharge groove and a residue removing mechanism. The side plates are fixed on both sidewalls of the box.    USE - The machine is useful for treating biogas residue and slurry.    ADVANTAGE - The machine is durable, reliable and has high filter rate for suspended organic matters.    DETAILED DESCRIPTION - Machine comprises a box and a filter. The multiple filters are set along length direction of the box. A box space between the filters is formed into a filter cavity section. A waste water inlet is opened on the box of the first filter cavity section. A filtrate outlet is opened at the bottom of the box on the last filter cavity section. The filter comprises a roller, a filter screen, a filter screen frame, a side plate, a discharge groove and a residue removing mechanism. The side plates are fixed on both sidewalls of the box. One side of the side plates on both sidewalls along the length direction of the box is fixedly connected to the sides of the filter screen frame. The rollers are fixed on a bearing block at the upper and the lower ends of the side plates at both sidewalls. The roller at upper end of the side plates is connected to a motor on the box through the bearing. The multiple rotary supporting elements are uniformly distributed on the two side plates between the upper and the lower rollers. The filter screen is sleeved between the upper and the lower rollers and located outside the supporting elements. The discharge groove with a discharge port at the side of the box is fixed at the side of the filter screen frame opposite to the side plates. The residue removing mechanism is designed between tops of the two side plates at one side of the discharge groove.