Farmyard manure fermentation system and method

The farmyard manure fermentation system comprises a fermentation box, a motor is fixedly welded to the center of the bottom of the fermentation box, a rotating shaft extending into an inner cavity of the fermentation box is fixedly installed at the output end of the top of the motor through a coupler, and second stirring mechanisms are evenly and fixedly welded to the positions, located in the inner cavity of the fermentation box, of the outer portion of the rotating shaft; first stirring mechanisms extending into an inner cavity of the fermentation box are fixedly mounted on the left side and the right side of the bottom of the fermentation box, a farmyard manure discharging pipe is fixedly connected to the bottom of the side wall of the right side of the fermentation box, a PLC is fixedly mounted at the upper end of the side wall of the left side of the front face of the fermentation box, and the PLC is electrically connected with the first stirring mechanisms and the motor. According to the farmyard manure