The invention relates to the agricultural field and the medicine industry, and particularly relates to a synanthrin derivative containing 1, 2, 3-triazole. A structural formula of the derivative is shown in the formula (1), wherein R is H or Cl, Cl is located in a 2, 3 or 4 position, and the average range of the degree of polymerization is 10-35. A preparation method comprises the steps of : through controlling reaction conditions of temperature, reactant ratio, time and the like, firstly, reacting benzoic acid or chlorinated benzoyl chloride with propargyl alcohol to obtain benzoic acid or chlorobenzoate propargyl ester, reacting with azido acetylated inulin to obtain benzoic acid alkyne or chlorobenzoate propargyl ester-1, 2, 3-triazole acetylized synanthrin derivative. The reaction is simple and convenient to operate, high in efficiency and easy to popularize; and required equipment and raw materials are easily available. The synanthrin derivative prepared in the invention has good amphipathy, and is enhanced in bioactivity of synanthrin, so that the synanthrin without a remarkable bacteriostasis activity generates a certain bacteriostasis activity, so that the application range of the synanthrin is increased and the synanthrin can be widely applied to the fields such as medicine and agriculture. The formula is described in the specification.
; 胡云霞
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