Fermentation tank

The utility model relates to the field of rice wine brewing, and discloses a fermentation tank which comprises a fermentation tank body and a stirring rod erected on the fermentation tank body, a supporting frame is erected at a pipe opening of the fermentation tank body, a containing groove is formed in the supporting frame, a supporting block is slidably connected into the containing groove, an insertion groove allowing the stirring rod to penetrate through is formed in the supporting block, and the stirring rod penetrates through the insertion groove. A rotating motor for driving the stirring rod to rotate is further fixedly connected to the supporting block, a rotating shaft is fixedly connected to the end of the supporting frame, the other end of the rotating shaft is inserted into the fermentation tank and rotationally connected with the fermentation tank, and a servo motor is fixedly connected to the rotating shaft; a steering block inserted into the placement groove is connected to the end of the othe