▎ 摘　　要

NOVELTY - Preparing macro-grained graphene and graphene oxide, comprises: (i) milling the graphite; (ii) optionally subjecting to heating under the protection of inert gas to obtain the fine graphite oxide dry powder; and (iii) subjecting to ultrasonication peeling in a solvent and separating the solid from the liquid. USE - The method is useful for preparing macro-grained graphene and graphene oxide (claimed). ADVANTAGE - The method has high yield, meets the requirement of batch production, is economical, simple and environmentally-friendly.