▎ 摘　　要

NOVELTY - The method involves annealing the copper foil at the constant temperature. The temperature of the copper foil is reduced to room temperature. The one time growth and second time growth are performed with carbon source gas. The pressure of the carbon source gas is higher than the gas in one growth step of the growth atmosphere. USE - Preparation method for single crystal graphene structure used for electric application. ADVANTAGE - The preparation method is simplified. The graphene structure is produced with high quality. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation illustrating the fast growth of single crystal graphite.