Cationic esterquat gemini surfactant(CEGSA)was prepared by using dimethyl amine,epichlorohydrin and adipic acid as starting materials.The effects of reaction time,reaction temperature and the dosage of catalyst on the yield of product CEGSA were studied.The product was qualitatively identified by IR spectra and elemental analysis and the contents was measured by two-phase chemical titration.The results showed that active matter content in the product is greater than 93.4%(mass).The cmc of this gemini esterq...