Preparation method of milk beverage

The invention provides a preparation method of a milk beverage. The preparation method comprises the following steps: preparing a dairy product mixture, a mixed solution of water and a sour agent witha predetermined volume ratio and a predetermined mass of essence according to a technical formula; performing on-line mixing on the dairy product mixture, the mixed solution of water and the sour agent with the predetermined volume ratio and the predetermined mass of essence according to the technical formula to obtain a milk beverage mixed solution; performing extraordinarily high-temperature instant treatment on the milk beverage mixed solution; and performing can filling on the milk beverage mixed solution subjected to the extraordinarily high-temperature instant treatment. The preparationmethod of the milk beverage reduces and improves the conversion operation time of the milk beverage, increases stability of physical and chemical indices of semi-finished products, improves proportioning efficiency, reduces preparation cost, reduces occupation area of adopted equipment and improves safety features.