▎ 摘　　要

NOVELTY - Preparing graphene copper-based composite material involves (a) establishing a graphene copper composite material model by using machine learning and high-throughput filter, (b) performing a first mixing treatment on the graphene, complexing agent and organic solvent to obtain a mixed product, (c) separating the mixed product in different centrifugal rotating speed intervals, (d) carrying out a second mixing treatment to modify the graphene product and the organic solvent according to the graphene-copper complex dispersion, and (e) providing a reducing agent, reducing the graphene-complexing agent-copper complex dispersion liquid and the reducing agent to obtain the graphene copper-based composite material. The complexing agent is methylamine, ethylenediamine, isopropylamine, isobutylamine, cyclopropylamine, secbutylamine, tert-butylamine, hexyl amine, dodecylamine, hexadecyl amine or octadecylamine. USE - The method for preparing graphene copper-based composite material is useful for high-speed electrified railway with speed of 250-300 km, preferably a railway, a major national economic artery, a key infrastructure and major livelihood projects. ADVANTAGE - The method enables to prepare graphene copper-based composite material, which has good dispersion effect of graphene in copper substrate, and good interface composite effect, which is good for wide application of composite material. The graphene surface complexing agent is complexed with the copper ion to form a graphene-complexing agent-copper ion complex dispersion system, which improves the dispersibility of the graphene in the copper substrate. In the method, in the process of the prior art method, the graphene can be uniformly dispersed into the organic system by surface modifying complexing agents, on the other hand, the surface of the copper salt material is reacted with the graphene by copper mirror reaction precise adjust and control depositing the graphene surface, and on the basis, claim graphene interface cross-scale composite mechanism in copper crystal crystallization process, coupling the process route of the copper crystal in the crystallization process, providing a graphene copper-based composite material large-scale stable preparation technology. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a graphene copper-based composite material; and (2) a high-speed rail contact the high-speed contact, comprising graphene-copper based composite material.