▎ 摘　　要

NOVELTY - Preparing graphene thin film involves supplying a substrate and then applying the substrate on the surface of carbon source layer in a controllable manner to obtain uniform thickness layer. The obtained carbon layer is heated and then performing a chemical reaction with heated material to obtain the graphene film layer. USE - Method for preparing graphene thin film (claimed). ADVANTAGE - The method enables to prepare graphene thin film has controlled carbon layer uniformity and thickness precisely, and with high quality.