▎ 摘　　要

NOVELTY - Preparing graphene comprises dispersing layered graphite in a solvent to obtain dispersion solution, subjecting the dispersion solution into high pressure extrusion through microchannel at 1 MPa higher than the pressure at the discharge end and obtaining graphene dispersion. USE - The method is useful for preparing graphene. ADVANTAGE - The method improves the production capacity of graphene and requires low device requirement, and does not generate metal impurities.