▎ 摘　　要

NOVELTY - A graphene preparation device comprises high-temperature and high-pressure kettle (4), high-temperature and high-pressure kettle piston (8), high-temperature and high-pressure kettle piston connecting rod (11), oil cylinder (19), oil cylinder piston (17) and material receiving tank (10). USE - Device for preparing graphene (claimed). ADVANTAGE - The device is capable of preparing graphene having large area and with crystal structure that is preserved completely. The content of the single-layer graphene is high, and graphene can be produced in batches. DESCRIPTION OF DRAWING(S) - The drawing is a schematic view of the graphene preparation device. Kettle (4) Kettle piston (8) Material receiving tank (10) Connecting rod (11) Oil cylinder piston (17) Oil cylinder (19)