Electromagnetic shielding material capable of preventing short circuit and resisting breakdown, preparation method and application

The invention relates to the technical field of electromagnetic shielding materials, and provides an anti-short-circuit breakdown-resistant electromagnetic shielding material, which comprises a plurality of shielding layers and a plurality of insulating layers, and the plurality of shielding layers and the plurality of insulating layers are alternately laminated and molded through adhesive layers; the shielding layer is prepared from, by mass, 30%-41% of nanometer ferroferric oxide magnetic powder, 7%-13% of nanometer materials, 8%-11% of titanium dioxide, 0.6%-5% of viscose, 3%-7% of ultrafine iron powder, 0.5%-3% of fumed silica and 36%-45% of graphite material wave absorbing powder. The insulating layer comprises the following components in percentage by mass: 57-69.5% of epoxy propane resin, 25-32% of methyl phenyl silicone resin, 0.5-6% of unsaturated polyester resin, 3-7% of an aromatic amine curing agent and 2-5% of fumed silica; the problems of electromagnetic interference, short circuit and breakdown