Fermentation storage tank

The utility model relates to the technical field of isatis root green leaf fermentation, in particular to a fermentation storage tank which comprises a storage tank body, a mounting groove is formed in the front end face of the storage tank body, a box door is hinged in the mounting groove, a thermometer is arranged at the bottom of a sealing ring, a tray is arranged between two sliding grooves located in the same horizontal plane, and a groove is formed in the upper surface of the tray. A partition plate is arranged in the middle of the inner wall of the limiting frame, a plurality of vent holes are formed in the partition plate, sliding blocks are arranged on the two side edges of the tray, and an exhaust pipe communicating with the interior is embedded in the top of the storage tank. According to the fermentation storage tank, the box door with the transparent window is arranged to be connected with the storage tank, a user can conveniently observe the fermentation state in the storage tank in real time th