▎ 摘　　要

NOVELTY - The preparation method of the multilayer electromagnetic shielding coating material based on the aramid nano-fiber involves: (a) taking a dimethyl sulfoxide aramid fiber nanofiber dispersion liquid to blade-coat a nylon mesh cloth, putting the coated fabric into a water bath to soak, taking out the coated fabric, and drying at low temperature to obtain the aramid fiber nanofiber coated film of the nylon mesh cloth; (b) uniformly spraying conductive nano-filler or magnetic nano-material on the nylon mesh aramid nano-fiber coating film in a spraying manner; and repeating the above step (a) and (b) on the sprayed surface. USE - Preparation method of the multilayer electromagnetic shielding coating material based on the aramid nano-fiber. ADVANTAGE - The preparation method can enable electromagnetic waves to be subjected to multiple reflection and absorption in the coating film, so that the composite film has better electromagnetic shielding performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the multilayer electromagnetic shielding coating material based on the aramid nanofibers.