▎ 摘　　要

NOVELTY - Preparing composite magnetic wave-absorbing material comprises blowing a hydrocarbon gas into a catalytic metal liquid in a molten state, forming three-dimensional wrinkled graphene during the ascent of the hydrocarbon gas, treating three-dimensional wrinkled graphene and potassium hydroxide at high temperature to obtain three-dimensional wrinkled porous graphene, mixing and stirring the three-dimensional pleated porous graphene, potassium permanganate, concentrated sulfuric acid, adding water and hydrogen peroxide to obtain three-dimensional pleated porous multifunctional graphene, dissolving the water-soluble salt of the magnetic metal with ferric chloride in water to obtain a metal salt solution, and mixing three-dimensional wrinkled porous multi- functional graphene with the metal salt solution, maintaining the pH greater than 8 and adding hydrazine hydrate at 80℃ to react for 4 hours. USE - The method is useful for preparing composite magnetic wave-absorbing material. ADVANTAGE - The material has excellent performance in absorbing electromagnetic waves in a full-band test, achieves 43dB partial frequency points, has dielectric loss, magnetic loss and structural loss, and greatly improves in terms of light weight and thin layer. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a composite magnetic wave-absorbing material prepared by the above-mentioned method; and a device for absorbing antenna radiation wave.