▎ 摘　　要

NOVELTY - Preparing broadband wave-absorbing material comprises (i) adding 200-300ml deionized water into 500ml beaker, heating at 50-90 degrees C, (ii) adding 10-30 g water-soluble polymer into the beaker under the condition of stirring, then completely dissolving, (iii) adding 0.5-3 g graphene powder into the above polymer aqueous solution and stirring until homogeneous, (iv) adding cleaning sponge block into mixed solution and re-extruding, and (v) adding the sponge block into the vacuum oven, drying at 50-80 degrees C to obtain final product. USE - The method is useful for preparing broadband wave-absorbing material (claimed). ADVANTAGE - The broadband wave-absorbing material has low density and absorption frequency.