▎ 摘　　要

NOVELTY - Preparing diamond-graphene heterostructure composite material involves placing diamond plated with a metal dielectric film into tubular furnace under hydrogen gas inlet, rising temperature rapidly, annealing and cooling to room temperature to obtain diamond-metal dielectric film-graphene composite material, and etching diamond-metal dielectric film-graphene composite material to obtain diamond-graphene heterostructure composite. USE - Method for preparing diamond-graphene heterostructure composite material. ADVANTAGE - The method enabes to prepare diamond-graphene heterostructure composite material which avoids the transferring process of the graphene, has high bonding force and good performance.