▎ 摘　　要

NOVELTY - The preparation method of composite melamine resin involves dissolving 0.7-0.9 pt. wt. polyacrylonitrile in dimethylformamide and then mixing, dissolving 0.3-0.5 pt. wt. polyethylene oxide in composite solvent of dimethylformamide/dichloromethane, adding 0.5-0.9 pt. wt. barium titanate, 2.2-2.5 pts. wt. graphene oxide, 0.5-0.7 pt. wt. trifluoroethyl methacrylate and 0.3-0.5 pt. wt. tert-butyl hydroperoxide to the mixture and then heating, dissolving polyvinyl alcohol in deionized water, adding weak acid including glacial acetic acid, melamine and formaldehyde solution to the mixture and then reacting, adding acetic acid aqueous solution of polyvinyl alcohol, alkali and pH regulator to the mixture and then adjusting pH value to 8-9, drying the mixture and then adjusting pH value to 5-6 and solidifying at 50 degrees C for 8-9 hours. USE - The method is useful for preparation of composite melamine resin. ADVANTAGE - The method enables preparation of composite melamine resin with excellent dielectric properties, thermal conductivity, thermal stability, dispersion uniformity, adhesive strength, flexibility and bending properties.