Abstract: Fumaropimaric acid chloride was prepared through Diels-Alder reaction and chlorination with rosin, fumaric acid and SOCl2 as raw materials. Using fumaropimaric acid as water-soluble monomer and diethylenetriamine as oil-soluble monomer, interfacial polymerization took place at the interface of two phases to produce the three-dimensional reticulate polymer wall, and oil was enveloped in microcapsules. The conditions of preparation of fumaropimaric acid chloride, emulsification, microencapsulation, and the ratio of core to coating were optimized. At the ratio of core to coating 7:1, emulgator dosage 6%, and stirring speed 3 000 r/min for emulsification and 800 r/min for microencapsulation, the embedding rate and embedding degree of microcapsules were 85.4% and 74.7%, respectively.