▎ 摘　　要

NOVELTY - Preparation of polyimide film involves dispersing graphite in solvent, gradually adding thionyl chloride, dianhydride and diamine, mixing uniformly, adding dilute solution of polar solvent, stirring uniformly, obtaining graphene oxide composite suspension, immersing the substrate in the obtained graphene oxide composite polyimide film suspension, removing the substrate, placing the substrate into a tubular furnace and dehydrating. USE - Preparation of polyimide film used for thin-film transistor flexible drive circuit (claimed). ADVANTAGE - The method provides polyimide film having excellent uniformity, electroconductivity and mechanical strength.