▎ 摘　　要

NOVELTY - Preparation of food packaging plastic sheet involves mixing and drying ethylene-vinyl alcohol copolymer extrudate, mixing and drying polyamide extrudate, subjecting upper and lower layer separately using the extrudates, cooling, biaxially stretching, obtaining ethylene-vinyl alcohol/polyamide substrate, adding to a vacuum spraying equipment, dispersing graphene in molten aluminum metal, subjecting resultant mixture to spray-atomization on surface of the substrate, quenching, fixing, and forming graphene-aluminum composite barrier coating on surfaces of the substrate. USE - Preparation of food packaging plastic sheet (claimed). ADVANTAGE - The method enables preparation of food packaging plastic sheet having excellent barrier property with respect to water and oxygen, durability and strength. The product accommodated in the packaging plastic sheet is safe, and has excellent shelf life.