The invention discloses an operation apparatus for overhauling a power transmission line. The operation apparatus comprises a vehicle body, a vertical arm, a guide rod, a transverse arm and a scissors head. A plurality of movable universal wheels are installed under the vehicle body. The vertical arm is fixedly disposed on the vehicle body. A sleeve pipe rotatable in a horizontal manner is embedded into the top end of the vertical arm. The transverse arm is in rotatable connection with the sleeve pipe. One end of the guide rod is fixedly disposed on the vertical arm. The guide rod is connected to the transverse arm in a sliding manner. The scissors head is fixedly disposed on the right end of the transverse arm. The beneficial effects of the operation apparatus are that: (1) line cutting workers can use the apparatus to cut superfluous wires, branches and foreign materials without manual operation, so the workload of the workers is greatly reduced; (2), through rotary cooperation between the guide rod and the vertical arm and the transverse arm, line cutting requirements in a wide-range space are realized; and (3) the scissors head is driven by a motor and the line cutting efficiency is greatly increased, so the operation apparatus is highly operable.