▎ 摘　　要

NOVELTY - A composite material comprises copper material and graphene wrapped around the surface of the copper material. The copper material is copper wire or copper block. The diameter of copper wire is 10-500 mu m or 100 mu m. The length of longest side of copper block is 10-500 mu m. USE - Composite material. ADVANTAGE - The composite material has excellent coating effect and avoids copper toxicity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method for the composite material which comprises providing carbon source and hydrogen in the presence of suspended end of copper material and performing chemical vapor deposition.