Volume-adjustable beer fermentation tank stirring device

The utility model relates to the technical field of beer equipment, in particular to a capacity-adjustable stirring device of a beer fermentation tank. A main body is composed of a tank top, a tank body and a tank bottom, the tank top is provided with a feeding port and a top motor, the top motor is connected with the upper half portion of a rotating shaft, a tank body is composed of two portions which are connected through an electric hydraulic device, a hydraulic rod is welded to the upper half portion of the tank body, and a power starting portion of the electric hydraulic device is connected with the lower half portion of the tank body. The electric hydraulic device is controlled by an external control box, a wine outlet and a bottom motor are arranged at the bottom of the tank, the bottom motor is connected with the lower half portion of the rotating shaft, the wine outlet releases finished wine after fermentation is completed, the upper portion of the rotating shaft is sleeved with the lower portion of