▎ 摘　　要

NOVELTY - Preparing a graphene copper-based composite material, comprises mixing graphene slurry and copper-based powder to obtain a powder, compressing the powder to obtain a green body, vacuum calcining the green body to obtain a cooked green body, subjecting the cooked green body to solution heat treatment and aging heat treatment to obtain the graphene copper-based composite material. USE - Preparing a graphene copper-based composite material for brake block (claimed), used in train braking system for ensuring safety of driving at high speed. ADVANTAGE - The preparation method is capable of obtaining high strength, high hardness, low abrasion loss and high thermal conductivity graphene the copper-based composite material, and prolongs the service life of the brake block. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a graphene of copper-based composite material; and a brake block.