Method for preparing soybean protein powder through glycosylation modification

The invention provides a method for preparing soybean protein powder through glycosylation modification, which comprises the following steps: adding a borax buffer solution into soybean protein powder, uniformly stirring and preventing generation of a large number of bubbles to prepare a protein solution; adding sugar into the protein solution according to a predetermined protein-sugar mass ratio, fully stirring, and carrying out glycosylation reaction at 60-80 DEG C for 1-4 hours to obtain a glycosylation product after the reaction is finished; and cooling the glycosylation product to room temperature, purifying, and freeze-drying to obtain the soybean protein-sugar compound. The prepared soybean protein-sugar compound has excellent acid resistance and high emulsifying property, the preparation method adopts a conventional damp-heat method, the process is relatively simple, no chemical reagent is added, the preparation method is green and pollution-free, and the preparation method can be used as a novel prep