▎ 摘　　要

NOVELTY - Preparing large-area multilayer graphene comprises providing substrate, placing the substrate in the reaction chamber, heating and annealing the substrate, introducing a carbon source, and performing chemical vapor deposition reaction to grow graphene on the annealed substrate, introducing water vapor into the reaction chamber during the chemical vapor deposition reaction, and maintaining the pressure during the growth of graphene to 20-400 Torr. USE - The method is useful for preparing large-area multilayer graphene. ADVANTAGE - The method: has simple process and low cost. The graphene: has uniform number of layers and large area. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for large-area multilayer graphene obtained by above method.