The invention provides an electric power high-voltage metering box. The electric power high-voltage metering box comprises a box body, a mounting seat is arranged at the top of the box body, a mounting hole is formed on the mounting seat, and a conductive screw is inserted into the mounting hole; an inserting conductive section inserted into the box body and a stretching conductive section stretching out of the box body are arranged on the conductive screw; the external of the stretching conductive section is sleeved with an insulating ceramic sleeve; a transparent sealing cover is covered outside the insulating ceramic sleeve; the upper thread is arranged at the upper section of the stretching conductive section, and the upper thread extends out of the insulating ceramic sleeve and is fixedly installed through a nut; a wire connecting end is arranged between the nut and the insulating ceramic sleeve; a retaining ring is arranged on the inserting conductive section; and the inserting conductive section between the retaining ring and the mounting seat is sleeved with a spring. Through the cooperation of the conductive screw and a limiting base, the rotation of the screw in the installation process is effectively prevented, and the loosening of the internal nut is avoided. The wiring is convenient through the lifting adjustment, and the upper end nut is always in a tensioning state by matching with the tensioning spring, and the electric power high-voltage metering box is hard to loosen.