Supporting platform for maintenance of high-voltage cable bridge

The utility model discloses a supporting platform for maintaining a high-voltage cable bridge, which belongs to the technical field of cable supporting platforms and comprises a supporting device assembly, the supporting device assembly comprises a supporting platform and clamping devices, the symmetrical clamping devices are assembled on the upper end face of the supporting platform, and the clamping devices are arranged on the supporting platform. Each clamping device comprises a mounting assembly and a clamping piece, the symmetrical clamping pieces are assembled in the mounting assembly, the clamping devices climb on the upper end face of the top plate through the climbing frame in the using process, and the clamping devices on the two sides make contact with the cable bridge on the roof through extension of the first telescopic rods; after contact, the tops of the sliding blocks on the two sides can make contact with the lower end of the cable bridge through rising of second telescopic rods on the two si