Preparation method of xylose for enhancing antioxidant activity of casein hydrolysis peptide

The invention discloses a preparation method of xylose for enhancing the antioxidant activity of a casein hydrolysis peptide. According to the preparation method, xylose is used as a glycosyl donor for enhancing the antioxidant activity of the casein hydrolysis peptide by virtue of a galactosylated modification technique. The preparation method particularly comprises the following steps: carrying out neutral protease hydrolysis on the raw material, namely casein, and carrying out ultrafiltration separation and freeze drying, so as to obtain the casein hydrolysis peptide; and preparing reaction liquid with a certain concentration from the xylose and the casein hydrolysis peptide, reacting under high-temperature and alkaline conditions, cooling, and carrying out freeze drying, so as to prepare the casein hydrolysis peptide with strong antioxidant activity. By utilizing the preparation method, the casein hydrolysis peptide with the antioxidant activity can be directly prepared and can be taken as a natural funct