EVA is prepared by copolymerization of ethylene (E) and vinyl acetate (VA) and referred to as EVA. EVA is characterized by good flexibility, rubber-like elasticity, good flexibility, transparency and surface gloss, good chemical stability, anti-aging and ozone resistance, non-toxic. It has good compatibility with filler, good coloring and molding processability. EVA can be injected, extruded, blown, calendered, rolled vacuum thermoforming, foaming, coating, heat sealing, welding and other molding processing, can be used as building materials for waterproof, fire, sound insulation and other functions.