Abstract: The ethylene-propyleme rubber insulating materials for charging cable was studied,according to the molecular weight distribution characteristics of the appropriate hard ethylene propylene rubber and the selection of appropriate modified materials,the developed vulcanized rubber tensile strength of 16 MPa,volume resistivity is greater than 1×10¹⁵ Ω·cm. Through the -40 ℃tensile test, it has good mechanical properties,electrical properties and low temperature resistance. The properties of the material fully meet the technical requirements of the charging cables for electric vehicles.