Microbial fermentation device

The utility model relates to the technical field of microbial fermentation, and discloses a microbial fermentation device. A fermentation cavity is formed in the fermentation box, and a liquid fertilizer discharge port, a solid fertilizer discharge port, a feed port and an air outlet which are communicated with the outside and the fermentation cavity are formed in the side wall of the fermentation box; the fermentation cavity is in a cuboid shape, a stirring assembly for stirring raw materials in the fermentation cavity is arranged in the fermentation cavity, and the stirring assembly comprises a stirring mechanism, a driving mechanism for driving the stirring mechanism to move back and forth in the length direction of the fermentation cavity, and a turnover mechanism for driving the stirring mechanism in the back and forth movement to rotate; through the arrangement, raw materials between the upper layer and the lower layer of the fermentation cavity can be fully mixed, so that the stirring efficiency is imp