Conductive　elastomer　materials　based　on　carbon　black　(CB)　filled　bromo-isobutylene-isoprene　rubber　(BIIR)/polypropylene　(PP)　thermoplastic　vulcanizate　(TPV)　were　prepared　by　two　step　method　and　one　step　method.　The　microstructure,　mechanical　properties,　electrical　resistivity,　thermal　stability,　electromagnetic　interference　shielding　performance,　and　fracture　surface　morphology　of　composite　materials　were　studied.　The　result　shows　the　serious　aggregation　of　CB　in　one-step　TPV,　but　the　uniform　dispersion　of　CB　in　two-step　TPV.　In　addition,　the　two-step　TPV　shows　a　higher　electromagnetic　interference　(EMI)　shielding　performance　and　lower　conductivity　penetration　threshold.　The　penetration　threshold　of　the　two-step　TPV　is　9.1%,　and　the　maximum　reflection　loss　of　the　two-step　TPV16　is　-29.5　dB.　Therefore,　this　research　offers　an　uncomplicated　and　scalable　melt　mixing　approach　method　to　manufacture　conductive　thermoplastic　vulcanizates　with　excellent　EMI　shielding.　©　2021　Yunyun　Huang　et　al.,　published　by　De　Gruyter.