[目的]研究甲基化-β-环糊精.三氟氯氰菊酯包合物的制备及田间药效。[方法]用液相法制备甲基化-β-环糊精·三氟氯氰菊酯包合物,用红外光谱法对该包合物进行表征,并对其杀虫效果进行试验。[结果]结果表明,该方法能使甲基化-β-环糊精和三氟氯氰菊酯包合成功,2.5%甲基化-β-环糊精.三氟氯氰菊酯包合物对大白菜无明显药害现象。[结论]甲基化-β-环糊精.三氟氯氰菊酯包合物极具推广和应用价值。 [Objective] The research aimed to study the preparation and field efficacy of methylated β-cyclodextrin inclusion compound. [Method] The inclusion compound of methylated-β-cyclodextrin · cyhalothrin was prepared by liquid phase method. The inclusion complex was characterized by infrared spectroscopy and its insecticidal effect was tested. [Result] The results showed that this method could successfully make methylated-β-cyclodextrin and cyhalothrin into 2.5% methylated-β-cyclodextrin, while cyhalothrin contained no obvious effect on Chinese cabbage Injury phenomenon. [Conclusion] The methylated-β-cyclodextrin and cyhalothrin inclusion compound are of great potential for promotion and application.