The invention discloses a preparation method of malus micromalus makino powder. The preparation method comprises the steps: by using malus micromalus makino as a raw material, sorting, alcohol-preparing, removing skins and kernels, protecting the color, crushing pulp, grinding, glue-grinding, removing alcohol, and concentrating; uniformly mixing the fruit pulp and malus micromalus makino haematochrome syrup according to a weight ratio of (1:0.03)-(1:0.07), homogenizing to obtain mixed pulp; filtering, vacuum-concentrating, freeze-drying, and crushing; adding citric acid, sodium citrate, beta-cyclodextrin, polyphosphates, and vitamin C to obtain the malus micromalus makino powder. The malus micromalus makino powder prepared by adopting the preparation method is capable of preserving the flavor of the raw materials, is bright red in color, rich in fruit fragrance, uniform in powder body forms, soluble in water, small in nutrient loss, good in storage property, excellent in sense and physicochemical indexes, and qualified in microbiological indicators. According to the preparation method, the pigment browning in a malus micromalus makino processing procedure is improved, and the market vacancy is filled; the preparation method can be applied to the development of malus micromalus makino resources.