▎ 摘　　要

NOVELTY - Preparation of graphene thin film comprises dissolving polymethyl methacrylate in acetone solution, forming concentration of 1-5 g/L acetone solution of polymethyl methacrylate, dropping solution on upper metal sheet, forming one layer of polymethyl methacrylate film, with thickness of 0.1-1 mm copper foil, nickel foil, gold foil or silver foil, forming polymethacrylic acid methyl ester film on metal sheet and forming one layer of polymethyl methacrylate thin film and covering with quartz glass, annealing in furnace, naturally cooling to room temperature, and obtaining graphene thin film. USE - Method of preparation of graphene thin film (claimed). DETAILED DESCRIPTION - Preparation of graphene thin film comprises dissolving polymethyl methacrylate in acetone solution, forming concentration of 1-5 g/L acetone solution of polymethyl methacrylate, dropping solution at 0.1-1 ml/minute on upper metal sheet, forming one layer of polymethyl methacrylate film, with thickness of 0.1-1 mm copper foil, nickel foil, gold foil or silver foil, forming polymethacrylic acid methyl ester film on metal sheet and forming one layer of polymethyl methacrylate thin film and covering with quartz glass into 99.99% nitrogen, annealing in furnace at 800-1000 degrees C for 120 minutes, naturally cooling to room temperature, and obtaining graphene thin film.