▎ 摘　　要

NOVELTY - The preparation method of three-dimensional graphene-coated copper composite material involves adding steel ball, copper and polymethyl methacrylate in a mass ratio of 150:10:0.1 to a milling pot, filling with argon as a protective atmosphere, milling to obtain a uniform dispersed copper-polymethyl methacrylate powder, reducing copper-polymethyl methacrylate powder at 800 degrees C for 10 minutes in hydrogen-containing reducing atmosphere, catalyzing poly(methyl methacrylate) to graphene. USE - Preparation of three-dimensional graphene-coated copper composite material (claimed). ADVANTAGE - The method enables the preparation of three-dimensional graphene-coated copper composite material having excellent isotropic property and mechanical property.