A polymer blended system of nylon 6 and ethylene-vinyl acetate copolymer (EVA) compatibilized with ethylene-vinyl acetate-acrylic acid ternary copolymer (EVAA) has been studied. EVA is incompatible with nylon 6, however, the combination of the EVA and EVAA results in compatibilized blends with good toughness. The compatibilization of EVAA is achieved by the similar structure with EVA and the reaction between its carboxylic groups and amine groups of nylon 6. The ternary blends were characterized through the mechanical, morphological and rheological property investigations. The dramatic increasing in impact strength and the fine dispersing of EVA in nylon 6 matrix demonstrated a good compatibilizing effect of EVAA on the blends of nylon 6 and EVA.