▎ 摘　　要

NOVELTY - The method involves placing a block-shaped graphite (10) with sharp angle (12) on a jet machine (20), providing the sharp angle corresponding to a nozzle (21) of jet machine, and activating the jet machine. The block-shaped graphite is cleaned by spraying the residual fluid on upper surface and lower surface (30) of block-shaped graphite. The primary graphite material is embedded in one end of sharp angle of block-shaped graphite. The graphene is torn out after bonding. The graphene is obtained. USE - Method for preparing large size graphene. ADVANTAGE - The graphene is prepared conveniently. The surfactant is environment-friendly and is non-toxic. The environmental pollution is reduced. The efficiency is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the block-shaped graphite. Block-shaped graphite (10) Sharp angle (12) Jet machine (20) Nozzle (21) Lower surface of block-shaped graphite (30)