The invention discloses a power transmission and transformation line repairing device. The device comprises a mounting plate, a storage box arranged on the mounting plate and a clamping component arranged at the bottom of the mounting plate; a first connecting block is arranged on the mounting plate, a first connecting rod is arranged on the first connecting block, a plurality of fan blades are arranged on the first connecting rod, a plastic pipe is arranged on the clamping component, a heating block is arranged in the storage box, rubber scraps are contained in the storage box, a dischargingpipe is arranged at the bottom of the storage box, and a check valve is arranged in the discharging pipe; the mounting plate is driven by the fan blades to fly to the upper part of the cable to repairthe cable; a worker only needs to operate the remote controller on the ground to complete the repairing operation of the high-altitude cable, and does not need to climb to the high altitude to repairthe electric wire, so that the potential safety hazard during cable repairing is reduced, the cable between the two telegraph poles can be conveniently repaired, and the cable is more convenient to maintain.