▎ 摘　　要

NOVELTY - The method involves mechanically grinding the copper powder and the solid carbon source powder to obtain mixed powder and heating the mixed powder in a reaction chamber, and introducing reducing gas to obtain a graphene-copper composite material. The graphene-copper composite material, the tin-based metal particles and the organic carrier are mixed to obtain the graphene reinforced tin-based composite solder. The solid carbon source powder has polymethyl methacrylate, polystyrene, polytetrafluoroethylene, polyimide. The reducing gas is one of hydrogen, a mixed gas of hydrogen and argon, and a mixed gas of hydrogen and nitrogen. The organic carrier is a mixture of hydrogenated rosin resin, glutaric acid, adipic acid, ethylene glycol, propylene glycol, polyethylene glycol, terpineol. USE - Method for preparing graphene reinforced tin-based composite solder. ADVANTAGE - The interface bonding strength of graphene and copper is improved in a chemical vapor reduction mode. The heat conduction performance of the composite solder is improved, the toughness of the composite solder is improved and the mechanical reliability of the service of the welding spot is enhanced. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for packaging graphene reinforced tin-based composite solder.