▎ 摘　　要

NOVELTY - Electromagnetic shielding composite material comprises an absorbing layer and a reflective layer compounded on the absorbing layer. The absorbing layer comprises a modified resin layer. The modified resin layer has an isolation structure. The reflective layer comprises metal nanowire film layer. USE - The composite material is useful in an application of 5G communication or aerospace (claimed). ADVANTAGE - The composite material has high electromagnetic shielding efficiency, low electromagnetic wave reflection and excellent mechanical properties, adopts the structure that can promote the filler in the absorption layer to overlap with each other to form a filler network, improves shielding efficiency of the absorption layer, reduces the reflection of electromagnetic waves and can replace the traditional electromagnetic shielding composite material and be applied to the emerging 5G communication field and aerospace application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite material involving (1) mixing a filler (A) and a solvent, adding a filler (B), continuously mixing, adding ferric chloride, alkali and hydrazine hydrate and reacting to obtain a modified filler, (2) stirring and mixing the modified filler and a resin and carrying out hot pressing to obtain the modified resin layer with the isolation structure and (3) compounding the plasma treated metal nanowire dispersion on the modified resin layer with the isolation structure to obtain the composite material.