The utility model relates to a tank which is used to store beverage, in particular to a tank used to store beer. The utility model is provided with one tank body which is used to load the beer. The outside of the tank body is provided with a thermal insulation layer and an outer case. The upper part of the tank body is provided with one control valve to control release of the beer. The inner side of the case is also provided with one miniature bottle of liquid carbon dioxide. The beer and the beverage held in the storage tank has the advantages of protecting from light, oxygen isolation, heat preservation and refrigeration. So, the preserving performance of the beer, the beverage is good. Storage period is long. The beer storage tank can be used repeatedly. Thus, sale price of the tank beer is lower that a general bottle beer and tin beer. A large quantity of beer is convenient to carry over in a long distance shipping, field operation, etc. by the tank.