▎ 摘　　要

NOVELTY - Preparing polymer-based carbon nanocomposite microporous electromagnetic shielding material comprises (i) preparing reduced graphene oxide, (ii) respectively ultrasonically dissolving reduced graphene oxide and the carbon nanotubes obtained in the step (i) and dispersing in N,N-dimethylacetamide to obtain mixed solution A, (iii) preparing graphene/carbon nanotube/polyamic acid homogeneous solution according to the mixed solution A obtained in the step (ii), (iv) adding dibutyl phthalate to the solution obtained in the step (iii), and uniformly stirring to obtain mixed solution B, and(v) taking out the solution obtained in the step (iv), transferring into a glass dish, drying, heating to obtain product. USE - The method is useful for preparing polymer-based carbon nanocomposite microporous electromagnetic shielding material. ADVANTAGE - The method: reduces the filling amount; and improves the electromagnetic shielding performance.