The present invention relates to power transmission line maintenance equipment that aims to improve repair efficiency of a communication cable. Tracks are respectively disposed at a left side and a right side of a vehicle body. A side vehicle board is slidably mounted between the tracks. A side vehicle board driving mechanism for driving the side vehicle board to move up and down is disposed between the side vehicle board and the vehicle body. A new cable assembly is disposed at the rear of the vehicle body and mainly includes support arms, an upper guide wheel and a lower guide wheel. A new cable rack is disposed between upper parts of the two support arms. Two wheel shafts are disposed between lower parts of the two support arms. The upper wheel shaft is provided with the upper guide wheel, and the lower wheel shaft is provided with the lower guide wheel. A new cable is extracted between the upper guide wheel and the lower guide wheel. An old cable recycling assembly is disposed at the left side of the vehicle body or/and the right side of the vehicle body. The old cable recycling assembly is used for winding and recycling an old cable. The vehicle body is provided with a toolbox that is used for accommodating different tools. Through adoption of the power transmission line maintenance equipment, physical labor of workers is greatly reduced, and cable repair work is carried out conveniently.