Disclosed is a lead connecting tool in particular to a conductor connecting device for electric power field wiring, including sleeves and power components, the upper part of the sleeve is provided with a sliding groove, a clamp is slidably mounted in the sliding groove, a lower portion of the clamping member is fitted with a sliding gear, a slide key is installed on the rotating shaft, a stationary gear and a sliding gear are arranged on that sliding key, the fixed gear and the lower part of the sliding gear are meshed and mounted with a power gear, a power gear is mounted on the power shaft,the edge of the bobbin is provided with a threading groove. The sleeve, the rotating shaft, the spool, the fixed gear and the sliding gear are all provided with placement grooves extending to the endportions, and the placement grooves of the fixed gear and the rotating shaft are arranged on corresponding positions, and the placement grooves of the sliding gears when the sliding gears are installed on the rotating shaft are different from the radial positions of the placement grooves of the fixed gears. The invention achieves the connection of wires with different diameters, widths and lengths, can save wires and cost, and can standardize nodes at the same time.