▎ 摘　　要

NOVELTY - Preparation of graphene film, involves modifying the functional group of graphite to obtain a graphene oxide sheet, during which metal particles are added and reacted with carbon atom on the graphene oxide sheet, and the metal particles are carbon atom are subjected to reactive etching to form holes, and removing the functional group by thermal reduction. USE - Preparation of graphene film. ADVANTAGE - The method inhibits thermal expansion of self-assembled graphene film.