The invention discloses a tooling for assembling a conductor. The tooling comprises a main support body and a butting device, wherein the butting device is arranged at the upper part of the main support body; an elevation tank body butting plate is arranged at the top end of the main support body to be butted with an elevation tank body; a bottom tank body butting plate is arranged at the bottom end of the main support body to be butted with a bottom tank body; an angle adjusting device is arranged between the bottom end of the main support body and the bottom tank body butting plate; the butting device comprises a plate for the conductor, a height adjusting device, a left and right support adjusting device and an adjusting support plate; the height adjusting device is arranged between the plate for the conductor and the adjusting support plate and can adjust the height of the plate for the conductor; the left and right support adjusting device comprises a telescopic support bar and a nut; the upper end of the telescopic support bar is hinged with the plate for the conductor; and the telescopic support bar stretches to be in contact with the adjusting support plate by adjusting the nut, so that the plate for the conductor can be stabilized. The tooling disclosed by the invention solves the problems that an existing high-voltage and extra-high voltage product conductor is difficult to hoist and align, not easy to assemble, low in butting efficiency and the like when butted and installed, and is high in butting efficiency.