Abstract: A flameretardant (EPMPP) based on a melamine pyrophosphate (MPP) core and epoxy shell were prepared through an insitu polymerization reaction at a reaction temperature of 75 ℃ with curing time of 4 h, and its morphology and microstructure were characterized by scanning electron microscopy, Fouriertransform infrared spectroscopy and water contact angle. The results confirmed that MPP particles were successfully encapsulated by epoxy resin. The flameretarded poly (ethylene-co-vinyl acetate) (EVA) composites were fabricated by a combination of EPMPP with aluminium diethylphosphinate (ADP) as an intumescent flameretardant system, and their flameretardant properties were investigated by limiting oxygen index, vertical burning experiment and thermogravimetric analysis. The results indicated that the composites achieved a UL 94 V-0 classification and an oxygen index value of 31 % when the intumescent flame retardant system was incorporated into EVA at a weight fraction of 40 % with an ADP/EPMPP mass ratio of 2/1. In addition, the composites exhibited an initial decomposition temperature of 303 ℃ and a char yield of 18 %.