▎ 摘　　要

NOVELTY - Device comprises a high pressure kettle, whose top is set with a discharge port set with a clamp, and a rupture disk set inside the clamp. USE - The device is useful for preparing graphene (claimed). ADVANTAGE - The device: produces high quality graphene; does not generate solid, liquid and gaseous wastes; has simple operation, and low energy consumption; and is suitable for large-scale industrial production of graphene. DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the device for preparing graphene.