▎ 摘　　要

NOVELTY - A fewer-layer graphene comprises graphene sheet having thickness of 3-4 nm. USE - Fewer-layer graphene. ADVANTAGE - The method is simple, economical, and suitable for large-scale preparation, and controls thickness of graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of reduced graphene layer comprising fewer-layer graphene adding graphite powder, sodium cholate powder and ethanol into mill pot, setting ball milling speed to 300-500 revolutions/minute, closing cover, ball milling for 7-20 hours, automatically shutting off.