Overhead power transmission line maintenance device

The utility model relates to the technical field of overhead transmission lines, and discloses an electric power overhead transmission line maintenance device, which comprises a fixing frame. The rocker is rotated by hand, the rocker drives the rotating handle to rotate during rotation, the rotating handle drives the threaded rod to rotate under the cooperation of the bearing during rotation, and the threaded rod drives the limiting plate to move upwards under the cooperation of the threaded groove during rotation, so that the device can be limited at any time; meanwhile, a pull handle is pulled by one hand, a limiting column is grabbed by the other hand to be pulled out, the limiting column can stretch due to elasticity of a spring after being pulled out, the spring can drive a sliding plate to move upwards through cooperation of a sliding rail and a sliding block when stretching, and the device is prevented from continuously sliding after reaching the fault position, so that the maintenance efficiency of th