▎ 摘　　要

NOVELTY - The method involves forming a polymer precursor film on the surface of the substrate by a spin coating method. A pre-oxidation process is used to form a pre-oxidation thin layer. A graphene film is formed by a high-temperature carbonization process. USE - Method for preparing graphene film. ADVANTAGE - The preparation method is simple, the process and equipment are simple, the process is easy to scale up, the production cost is low, and the product quality is controllable.