The invention belongs to the technical field of food additives, and particularly relates to a preparation method of a natural
plant pigment composition and application of the natural
plant pigment composition in food. The preparation method comprises the following steps: S1, dissolving a natural
plant pigment in water to obtain a natural plant pigment solution, adjusting the pH value of the natural plant pigment solution to 7-8, then adding
cyclodextrin, uniformly stirring, continuously stirring, and standing after stirring to obtain a solution I; s2, sequentially adding spirulina
peptidoglycan and
polyamino acid into the obtained solution I, uniformly mixing, stirring, adding
halide salt after stirring, continuously stirring, standing after stirring, centrifuging, mixing an obtained
solid product with edible auxiliary materials, and freeze-
drying to obtain the natural plant
pigment composition. The raw materials used in the invention are food-grade, safe and harmless, and can be used in food
dyeing and coloring, endow food and beverage products with saturated and uniform colors, and improve the brilliance of food.