▎ 摘　　要

NOVELTY - High barrier graphene composite film comprises at least one layer of composite film including parylene film and graphene film, which are alternatively layered. The top and bottom of the composite film includes parylene film. USE - The composite film is useful for packing medicine, food and electronics. ADVANTAGE - The composite film has excellent mechanical property, chemical stability, flexibility and high transparency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite film, comprising: (i) attaching parylene film on the graphene deposited metal substrate surface; (ii) separating the metal substrate to obtain a double layer structure of graphene films and film parylene film bonded phase; (iii) re-depositing parylene film on the other surface of the graphene film, to obtain parylene film, graphene film and parylene film composite film layered structure; (iv) fixing at least 2 composite films by the adhesive to form multilayer composite film.