探索并建立了用环氧氯丙烷与混合胺反应制备阳离子Ｏ／Ｗ型乳液破乳剂的方法。通过正交实验，选择出合成反应的最佳条件及合成路线，并对其破乳性能和最佳用量进行了初步的考察。实验结果表明，这种阳离子型Ｏ／Ｗ乳液破乳剂具有良好的破乳性能，其破乳效率优于目前油田普遍使用的反相破乳剂ＣＷ０１。 The method of preparing cationic O / W emulsion demulsifier by using epichlorohydrin and mixed amine was explored and established. Through the orthogonal experiment, the optimum conditions and synthesis route of the synthesis reaction were selected, and the demulsification performance and the best dosage were also investigated. The experimental results show that this cationic O / W emulsion demulsifier has a good demulsification performance, and its demulsification efficiency is superior to the commonly used reverse demulsifier CW  01 currently used in oil fields.