▎ 摘　　要

NOVELTY - Electromagnetic screen of plant-derived conductive graphene comprises (i) extracting straw, forest tree or corn cob to obtain natural polymer materials; (ii) under the oxygen free environment, placing the obtained natural polymer material in an environment of 400-1400 degrees C, and performing heat preservation to obtain graphene precursor-activated carbon; (iii) washing the activated carbon to obtain the final product graphene; (iv) making the graphene into a printable solvent; (v) using graphene printing to form graphene electromagnetic film on PET film; and (vi) attaching the graphene electromagnetic film to the screen to form an electromagnetic screen. USE - The method is useful for electromagnetic screen of plant-derived conductive graphene. ADVANTAGE - The method: reduces the difficulty of obtaining graphene, reduces the pollution to the environment; achieves the purposes of reducing the difficulty of obtaining graphene, increases the production capacity of graphene, and reduces the production cost of graphene.