▎ 摘　　要

NOVELTY - Preparation of graphene comprises dry-grinding graphite for a period of time in a grinding machine including grinding body and auxiliary grinding medium, placing obtained powder and acid solution into a high-pressure reactor to react to obtain the graphene. USE - The method is useful for preparation of graphene. ADVANTAGE - Graphene has uniform lateral size, less thickness layers, high peeling efficiency (up to 92%) and high yield (up to 85.26%), and is suitable for large-scale popularization. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene.