▎ 摘　　要

NOVELTY - Preparing graphene-copper composite ultra-high-conductivity material involves mixing ion water, copper salt, reducing agent and surfactant, mixing with extracting agent, mixing with graphene, high temperature reacting, centrifuging to obtain solid substance, cleaning, vacuum drying, oxidizing, mixing with copper powder, ball milling, vacuum drying, and roasting under hydrogen atmosphere. USE - Method for preparing graphene-copper composite ultra-high-conductivity material. ADVANTAGE - The method helps in improving uniformity of graphene and copper powder ball milling, which reduces agglomeration phenomenon under high graphene content, where obtained ultra-high-conductivity material has good strength and conductivity.