▎ 摘　　要

NOVELTY - Preparing graphene foam film for shielding terahertz waves from polystyrene microspheres, comprises placing the graphene oxide aqueous solution into a dialysis bag, and completely immersing the dialysis bag in absolute ethanol for dialysis to obtain a concentrated graphene oxide aqueous solution, placing the concentrated graphene oxide aqueous solution on a glass plate, adding polystyrene microspheres, and physically stirring to obtain an earthy yellow plastic mixed slurry, transferring the ocher plastic mixed slurry into the mold, scraping the upper surface smoothly, placing horizontally and drying naturally, and taking out a brown-yellow film sample, and heating the obtained film sample to obtain a dark gray graphene foam film with metallic luster. USE - Method for preparing graphene foam film form shielding terahertz wave by polystyrene microsphere used in thin film material of assembling structure of nano-carbon material and two-dimensional carbon material. ADVANTAGE - The method provides graphene foam film with thin thickness, light weight, flat surface, uniform hole size in the film, controllable porosity, and good terahertz wave shielding performance.