Abstract: The effects of the amount of carbon black N330 from three different manufacturers on the mechanical properties,anti-aging properties and electrical properties of ethylene propylene diene monomer（ EPDM） cable compound were studied. The results show that,the effects of carbon black N330 from three different manufacturers on the properties of EPDM cable compound are similar. Namely,the tensile strength and tear strength of the compounds can be improved obviously when the content of N330 was 8-16 phr. With the content of carbon black N330 raise,the elongation at break of the compounds decreases gradually,but all of its were above 700%. After hot air accelerated ageing,the change rate of tensile strength and the change rate of elongation at break of the compounds were between-30% and +30%. When the N330 content was 16 phr,the volume resistivity and breakdown strength of the compounds were not less than 10¹⁴Ω·cm and 19 kV/mm respectively. The EPDM cable compounds has excellent comprehensive properties when the content of N330 was 8-16 phr.