The invention discloses a heat-resistant rubber capacitor case packaging material. The heat-resistant rubber capacitor case packaging material consists of the raw materials including chloroprene rubber CR121, a SG-4 polyvinyl chloride (PVC) resin, poly-4-methyl-1-amylene, N, N'-m-phenylenedimaleimide, alumina powder, barium sulfate powder, an anti-aging agent RD, 2-mercaptobenzimidazole, zinc stearate, an accelerator CZ1-2, an accelerator DM, 3-aminopropyl trimethoxy silane, an aluminate coupling agent DL-411, an oxidant, highly-wear-resistant carbon black N330, carbon black N220, imarcaptoacetate dioctyltin, epoxy ethylhexyl stearate, glycerin triacetate, sodium bicarbonate, modified coal ash and dicyclopentadienyl iron. By virtue of a reasonable formula of the raw materials, the produced rubber material has good comprehensive performance and is high in metal adhesion, mechanical property, fatigue resistance, ageing resistance and the like, and can provide high-strength protection for capacitors.