 This research has developed a new type of EMA shielding material based on three-dimensional graphene oxide, GO, with regular honeycomb structure, GH, amino-functionalized FeNi alloy particles, FeNi, and epoxy resin. The resulting RGH at FeNi slash epoxy composites show excellent EMA shielding performance, thermal stability, and mechanical properties. This study provides a promising approach for developing efficient EMA shielding materials. This article was authored by Ping Song, Zhong Lei Ma, Hua Chiu, and others.