Preparation method and preparation device of milk-containing beverage

The invention relates to the technical field of milk beverage fermentation, in particular to a milk-containing beverage preparation method and a preparation device thereof.The milk-containing beverage preparation device comprises an operation box, the upper portion of the operation box is covered with a cover plate, an outer cylinder is arranged in the operation box, an edge strip is fixedly installed on the inner side wall of the outer cylinder in the circumferential direction, and a dovetail groove is formed in the middle of the edge strip; through the arrangement of the operation box, temperature loss can be avoided when the temperature in the outer barrel is increased, through the arrangement of the cover plate, the temperature in the operation box can be rapidly dissipated when milk beverage is cooled, and through the opening of the electric sliding block, a dovetail plate moves upwards to drive the fermentation barrel to be lifted up, so that the fermentation barrel is disassembled and cleaned after bei