The invention relates to the field of cosmetic and pharmaceutical industries, in particular to 1, 2, 3-triazole starch derivatives and a preparation method thereof. The structural formula of the 1, 2, 3-triazole starch derivatives is represented by the formula (1), wherein R is an alcoholic hydroxyl group containing chains with different lengths, and the average degree of polymerization n ranges from 5 to 12000. According to the invention, the reaction is efficient, the 1, 2, 3-triazole starch derivatives and the preparation method are easy to popularize, the required equipment and raw materials are readily available. Researches show that the synthesized 1, 2, 3-triazole starch derivatives are good in water solubility and excellent in oxidation resistance; the biological activity of starch is improved, and the application range of starch is enlarged; the 1, 2, 3-triazole starch derivatives can be widely used in the field of cosmetic and pharmaceutical industries. (The formula (1) is shown in the description).
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