The invention discloses an epoxy resin conductive adhesive, an electromagnetic shielding film, and a preparation method of the epoxy resin conductive adhesive and the electromagnetic shielding film. The epoxy resin conductive adhesive comprises butadiene-acrylonitrile rubber monomer, an anti-oxidant, an amine curing agent, an imidazole curing agent, a catalyst, an epoxy resin monomer, an acrylatemonomer, a butanone modifying agent, glass bead, and conductive nickle powder. The preparation method comprises following steps: the acrylic monomer is fully mixed with the epoxy monomer to be uniform, and the anti-oxidant, the amine curing agent, the imidazole curing agent, the catalyst, and conductive nickle powder are added, so that it is ensured that the epoxy resin conductive adhesive obtained via modification possesses excellent conductivity, high temperature resistance, adhesiveness, and electromagnetic shielding efficiency, the application value in the fields of electromagnetic wave protection and related fields is high. The preparation method and a film forming method of the epoxy resin conductive adhesive are simple, and manufacturing cost is low.