▎ 摘　　要

NOVELTY - Preparing graphene comprises (i) dipping graphite rod in concentrated sulfuric acid for 5 minutes; (ii) adding the dipped graphite rod into a potassium permanganate solution for 5 minutes to obtain a graphite oxide rod; (iii) crushing the graphite oxide rod to obtain graphite oxide particles; and (iv) adding the graphite oxide particles into a graphene preparation device. The graphene preparation device comprises a purifying module and a sealed cabin, where the sealed cabin comprises an upper bottom plate, a side plate and a lower soleplate. The device further comprises a shaking module and a crushing module. The shaking module and a crushing module are located in a closed chamber. The shaking module is mounted on the side panel on the inner wall. The crushing module is mounted on a lower surface of the upper bottom plate. The shaking module is used for lifting the graphite particles, and the crushing module is used for crushing the raised graphite particles. USE - The method is useful for preparing graphene. ADVANTAGE - The method improves the production efficiency of graphene.