Abstract: As an fine thermal transfer medium, conductive heat oil (heat medium) has been widely used for the advantage of higher thermal transfer temperature at low pressure. But partial of it has to be imported and the price is expensive. In order to lower oil pipeline transportation cost, chemical category and analysis are carried out for the conductive heat oil using aboard and puts forward a blending method for producing mineral-oil conductive, heat oil based on the composition of mineral-oil conductive heat oil. It is proofed by lab experiment that the blended conductive heat oil presents not only low cost but also high quality which compares favorable with that of domestic famous brand.