▎ 摘　　要

NOVELTY - The supercritical graphene preparation device comprises reaction device, support mechanism, heating device, quenching device and guide rail. The reaction device is connected to support mechanism. The guide rail is arranged below the reaction device. The heating device and quenching device are slidably connected to guide rail, and are alternately slide along the guide rail below the reaction device. USE - Supercritical graphene preparation device (claimed). ADVANTAGE - The device enables economical preparation of supercritical graphene with high yield and quality. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing supercritical graphene using device.