The invention discloses a power transmission line aerial work lifting platform. The power transmission line aerial work lifting platform is characterized by comprising a foundation and a platform, wherein the lower end of the platform is hinged with two telescopic rods, the lower end of each telescopic rod is hinged with a sliding seat, the sliding seats are provided with inner threads, the two inner threads have opposite screwing directions, screws in matching with the two sliding seats are provided, the screws are provided with two thread portions, the two thread portions are in reverse direction and are in matching with the two inner threads of the sliding seats, two sides of the sliding seats are provided with upper and lower supporting rods, and end portions of the upper and lower supporting rods are respectively provided with a bearing. Compared with the prior art, the power transmission line aerial work lifting platform has advantages of stability and firmness.