▎ 摘　　要

NOVELTY - A composite film based on glass carbon and graphene comprises precursor components such as (mass%) graphene sheet (0.1-50) and polyimide base material (99.9-50). USE - A composite film based on glass carbon and graphene. ADVANTAGE - The film has flexural strength of more than 600 MPa. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of preparing composite film based on glass carbon and graphene by carbonating polyimide precursor film at less than 2500 degrees C, clamping film between two polished graphene sheets under the protection of inert gas, heating at 900-1200 degrees C under 0.2-20 degrees /minute for 1-5 hours, and processing high temperature treatment at 2000-2500 degrees C.