Operation ladder trolley for daily maintenance of overhead line system

The invention discloses a daily maintenance catenary operation ladder truck which comprises a left ladder truck main beam and a right ladder truck main beam, connecting sleeves are fixedly connected to the bottom ends of the two ladder truck main beams, a plurality of rotatable pedals are arranged on the two ladder truck main beams, a concave rod is fixedly connected to the top of the ladder truck main beam located on the left side, and the concave rod is fixedly connected to the top of the ladder truck main beam located on the right side. The concave rod is arranged at the top of the main beam of the left ladder truck, so that the top end of the main beam of the right ladder truck is rotationally connected with the inner surface of the concave rod, the overall height of the ladder truck can be changed, the ladder truck is functionally converted from a fixed integral type to a folding type, and before folding, only a threaded sleeve in the assembly needs to be easily controlled, so that the ladder truck can b