Electrically conductive polymer composites as electromagnetic shielding materials have been developed rapidly during last few years, specially composites originated from conductive nanofillers such as carbon nanotubes (CNT). A polymeric shield needs to have acceptable mechanical properties, good processability and suitable impact resistance. In the present work, attempts have been to fabricate electromagnetic wave absorber nanocomposite based on dynamically vulcanized polypropylene (PP)/Ethylene-propylene-diene monomer rubber (EPDM) thermoplastic elastomer and multiwall carbon nanotube (MWCNT) as electrically conductive nanofillers via melt mixing process. Maleic anhydride grafted polypropylene (PP-g-MAH) and dicumyl peroxide (DCP) were employed as interfacial compatibilizer and curing agent respectively. The influences of the EPDM's crosslink density, amount of compatibilizer and CNT feeding rout on electrical conductivity, permittivity and shielding effectiveness (SE) characteristics, were investigated through different amounts of dicumyl peroxide, PP-g-MAH and adding CNT before and after dynamic vulcanization,respectively. Developed microstructures were characterized using scanning electron microscopy (SEM), melt rheomechanical spectroscopy (RMS) and were correlated with electrical conductivity and electromagnetic interference (EMI) shielding effectiveness. Keywords: nanocomposite; electrical conductivity; dynamic vulcanization; PP/EPDM; thermoplastic vulcanizate (TPV); electromagnetic interference shielding; permittivity