▎ 摘　　要

NOVELTY - Preparation of graphene comprises mixing organic carbon source and reducing metal, and orderly performing first calcining at 500-650degrees Celsius and second calcining at 700-1200degrees Celsius in protective atmosphere. USE - The method is for preparing graphene. ADVANTAGE - The preparation method directly mixes the organic carbon source and reducing metal to provide condition for ensuring that the intermediate and metal powder are fully contacted after subsequent organic carbon source is coverted into intermediate. The whole reaction process does not need any solvent to participate in the reaction, and obtains high crystalline graphene.