▎ 摘　　要

NOVELTY - A graphene is prepared by cleaning substrate, drying, and coating solid carbon source compound on surface of substrate (S1); coating solid carbon source compound to substrate into reaction chamber, after sealing the reaction chamber to 103 Pa, vacuumizing for 1-30 minutes, and heating substrate (S2); and subjecting substrate to 400-1300 degrees C, performing heat preservation for 1-300 minutes, stopping heating, and cooling to room temperature to obtain graphene on the surface of substrate (S4). USE - Method for preparation of graphene (claimed). ADVANTAGE - The method has simple technical process, does not need to add additional catalyst in reaction and process equipment, has low preparation cost, and is suitable for industrial production. DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a preparation method of graphene. Cleaning, drying, and coating solid carbon source compound on surface of substrate (S1) Coating solid carbon source compound to substrate into reaction chamber (S2) Performing heat preservation, and cooling to room temperature to obtain graphene on surface of substrate (S3)