The invention relates to the field of daily health products and the pharmaceutical industry, in particular to an N-(ethylamino) inulin and preparation and application thereof. The N-(ethylamino) inulin is as shown in a formula (1), wherein the average value of n ranges from 10 to 35. The preparation method comprises the following steps of : halogenating or esterifying the inulin with sulfonic acid chloride; then reacting the inulin for 8 to 24 hours at the temperature of 40 to 90 DEG C; and purifying the inulin to obtain the N-(ethylamino) inulin, wherein the molar weight of the anhydrous ethylenediamine is 30 to 40 times the weight of the inulin. The obtained compound can be used as an antioxidant. The preparation has the advantages of simple synthetic process, easy popularization and easily available needed equipment and raw materials. The product obtained by the invention can be widely applied to the fields of biology, medicament, foods, chemical industry and the like.
; 任剑明; 董方
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