Tea fermentation tank

The utility model discloses a tea fermentation tank which comprises a tank body, a telescopic stirring assembly is fixedly arranged at the top of the tank body, a protective shell is fixedly arranged on one side of the tank body, a fixing assembly is arranged on the outer side of the tank body, and a first filter plate is rotationally arranged in the tank body. A second filter plate and a third filter plate are slidably connected into the tank body, through cooperation of the third filter plate and a rotating rod, after tea fermentation is completed, the third filter plate is pulled, a rack can be driven to move when the third filter plate moves, the rack can drive a third gear and a mounting rod to rotate, and when the mounting rod rotates, a rope can be wound, so that tea fermentation is completed. The rotating rod is pulled to deflect, one end of the rotating rod tilts, so that the first filter plate is driven to incline, all tea leaves on the first filter plate fall onto the second filter plate, the secon