The invention relates to a pure natural green high-
anthocyanin purple sweet potato beverage prepared by using purple sweet potato as
raw material and a preparation method of the pure natural green high-
anthocyanin purple sweet potato beverage. The beverage has high
anthocyanin content and high juice yield. The preparation method comprises the steps of: taking purple sweet potato as
raw material, carrying out the technological processes of choosing, cleaning, pre-
processing, shelling,
cutting into slices (dicing), protecting color, pasting, pulping, enzymolyzing, centrifuging and filtering, preparing purple sweet potato juice with
high concentration and original
flavor, blending, adding stabilizer and sweetener, homogenizing (or
grinding by a
colloid grinder), bulking and sterilizing. The beverage has peculiar purple and fragrance of the purple sweet potato, soft taste and pure taste, can be stored for a long time and convenient for eating. The beverage contains high-concentration anthocyanin, is ideal natural green functional beverage and has various functions such as inoxidability, anti-
aging property, and
cancer resistance.