▎ 摘　　要

NOVELTY - Preparation of graphene composite foam metal comprises soaking foam metal in dispersion of graphene oxide quantum dot and graphene composite nanomaterial, discharging air remaining in pores of the foam metal, fully soaking the foam metal such that the graphene oxide quantum dot and graphene composite nanomaterial dispersion is coated on the surface of foam metal, taking out, and obtaining the product; or heating the foam metal at 100-300 degrees C, soaking in a dispersion of graphene oxide quantum dot and graphene composite nanomaterial,, cooling, and obtaining the product. USE - Preparation of graphene composite foam metal (claimed). ADVANTAGE - The method provides graphene composite foam metal, which has graphene layer having controllable size and performance, and high bonding force of graphene layer and foam metal substrate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene composite foam metal comprising metal foam substrate and graphene layer on metal foam substrate surface, where graphene layer comprises graphene oxide quantum dot and graphene.