The utility model relates to a shielding line for inhibiting ground composite field intensity below high-voltage direct current lines and belongs to the technical field of electromagnetic environment protection of electrical power system electric transmission lines. The shielding line comprises a plurality of shielding wires, a shielding line pole tower body, a cross arm and a plurality of hanging points, the shielding line pole tower body is used for erecting the shielding wires, the cross arm is matched with the shielding line pole tower body, the hanging points are arranged on the cross arm and a tower neck and used for hanging shielding wire hanging pieces, and the plurality of hanging points are arranged on the cross arm at equidistant intervals and used for hanging the shielding wires arranged in different modes. A center shaft of a shielding line pole tower relative to the horizontal position is located at the position 3 meters away from the straight line where a center of a transmission conductor is located. According to the shielding line, on the basis that original electric transmission line establishing schemes are not changed, parameters of electromagnetic environments on the periphery of a direct current transmission line can be controlled. On the premise that radio interference, audible noises and corona losses are not improved, the inhabitation of the ground composite field intensity can be achieved, erection costs of poles and towers can be greatly saved, and simultaneously, power transmission corridors can be reduced so that extra-high voltage direct current transmission projects are economical and reasonable.