▎ 摘　　要

NOVELTY - The method for enhancing graphene oxide film involves immersing graphene oxide film in non-solvent for swelling, soaking in non-solvent, stretching the film after swelling under stretching ratio of 2-8%, applying an external force to maintain the current length, releasing the stress between the sheets until the stress between the sheets is 0, completing the strengthening of graphene oxide film, drying, and applying external force during drying to maintain the current length. USE - Method for enhancing graphene oxide film used in preparation of high-strength graphene film (claimed). ADVANTAGE - The method enables processing of graphene oxide film with high efficiency by simple and controllable process, and obtains high-strength and high-quality graphene film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of high-strength graphene film, which involves mixing graphene oxide solution and defoaming, depositing on a substrate, volatizing solvent, removing graphene oxide film, immersing graphene oxide film in a non-solvent to swell, stretching the film after swelling under stretching ratio of 2-8%, applying an external force to maintain the current length, releasing the stress between the sheets until the stress between the sheets is 0, completing the strengthening of graphene oxide film, drying, and applying external force during drying to maintain the current length.