NOVELTY - A dry anaerobic fermenting reaction device automatically shifting precipitated material, comprises a reaction device and a mechanical stirring device; where the reaction device is constituted by a rectangular concrete tank with a cover on the top; the mechanical stirring device is arranged inside the reaction device which is set with a material inlet on one end; the material inlet is connected with a conveying pump through a pipe; and the other end of the reaction device is set with a material discharging device achieving a material discharge purpose by a suction mode.    USE - The dry anaerobic fermenting reaction device automatically shifting precipitated material is useful for anaerobic fermentation of biodegradable organic wastes with high solid content.    ADVANTAGE - The dry anaerobic fermenting reaction device uses a relative control program for fully automatic running; thus, it has small volume, convenient construction, low energy consumption, and high gas output.    DETAILED DESCRIPTION - A dry anaerobic fermenting reaction device automatically shifting precipitated material, comprises a reaction device and a mechanical stirring device; where the reaction device is constituted by a rectangular concrete tank with a cover on the top; the mechanical stirring device is arranged inside the reaction device which is set with a material inlet on one end; the material inlet is connected with a conveying pump through a pipe; the other end of the reaction device is set with a material discharging device achieving a material discharge purpose by a suction mode; the upper end of the reaction device is set with a gas collecting cavity and a safe gas exhausting valve; the top of the cavity is set with a methane collecting and exhausting port; a heating and heat preserving device is arranged on the reaction device; and the mechanical stirring device is constituted by at least two or more than two stirring mechanisms longitudinally distributed along the reaction device at equivalent intervals with identical height.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the dry anaerobic fermenting reaction device automatically shifting precipitated material.