Rice straw returning device based on microbial fermentation

The invention discloses a rice straw returning device based on microbial fermentation, and relates to the technical field of straw returning, and the rice straw returning device is characterized in that a top cover body is fixedly arranged at the top end of a machine body and is in an inclined state, a feeding port is formed in the higher side of the top cover body, and a discharging groove is formed in the middle of the machine body; the supporting frame is supported at the bottom end of the machine body; the feeding bottom plate is fixedly arranged at the bottom end of an inner cavity of the top cover body, and the outer end of the feeding bottom plate extends to the outer side of the top cover body; the fermentation liquid supply assembly is fixedly arranged on the outer wall of the top cover body; the straw treatment mechanism is arranged in the feed port and connected with the fermentation liquor supply assembly, and the straw treatment mechanism further comprises a driving assembly, a flattening assembl