Feed fermentation device

The utility model relates to the technical field of biological devices, in particular to a feed fermentation device which comprises a base, a fermentation tank is fixedly mounted at the upper end of the base, a third bevel gear is arranged on the left side of the upper end of the base, a rotating shaft is fixedly mounted at the lower end of the third bevel gear, and a limiting wafer is fixedly mounted at the lower end of the rotating shaft. A rotating ring sleeve is rotatably mounted at the left side end of the fermentation tank in a penetrating and inserting manner, and two groups of first stirring blades are fixedly mounted on the circumferential surface of the right side section of the rotating ring sleeve. Through the arrangement of the first bevel gear, the second bevel gear and the third bevel gear, the device generates cross stirring during fermentation stirring, the straw stirring effect is improved, the fermentation effect is improved, the situation that straw adheres to the inner wall of the ferment