▎ 摘　　要

NOVELTY - Preparing continuous single-layer single-crystal graphene film comprises electrochemically polishing the single crystal copper to obtain a single crystal copper substrate, further performing graphene growth on the single crystal copper substrate to obtain final product. USE - The method is useful for preparing continuous single-layer single-crystal graphene film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for continuous single-layer single-crystal graphene film obtained by above method.