The utility model relates to a novel special high voltage direct current circuit of wire arrangement form, its characterized in that: this secret agent high voltage direct current circuit includes positive wire and cathode conductor, and wherein, the cross -section of positive wire is less than the cross -section of cathode conductor. Under the prerequisite that satisfies the transport capacity, the cross -section of positive wire is less than the cathode conductor cross -section, and the cathode conductor cross -section is great, and the direct current circuit satisfies the electromagnetic environment requirement, and the positive wire cross -section is less, can reduce shaft tower weight, reduces the insulator tonnage, consequently not only satisfies transport capacity and electromagnetic environment requirement, is favorable to reducing the investment of circuit body moreover, improves the economic nature in the whole life cycle. The utility model discloses can the wide application in the less direct current transmission circuit of loss hourages such as wind -powered electricity generation, water and electricity, be favorable to reducing the body investment.