▎ 摘　　要

NOVELTY - A high quality graphene preparation method involves preparing oxidized graphite alkene and heating mixture at 500-700 degrees C under inert atmosphere to obtain graphene. The obtained graphene is subjected to plasma sintering or vacuum sintering, where vacuum of 10-30 pa and pressure of 40-60 Mpa are applied. The graphene is further heated at 1300-1500 degrees C for 5-30 minutes to obtain the high quality product. USE - Method for preparing high quality graphene. ADVANTAGE - The method enables preparing high quality graphene in a simple, easy and cost-effective manner.