Ladder for repairing navigation mark

The utility model relates to the technical field of ladders, in particular to a ladder for repairing navigation marks. Comprising two ladder main bodies, and a plurality of pedals are fixedly connected between the two ladder main bodies; the two sides of the ladder body are fixedly connected with a clamping arm and a connecting frame used for being hung on a ship body respectively. Wherein the number of the clamping arms is two, the two clamping arms are symmetrically and rotationally installed at the two ends of one side of the ladder body, and the inner side arc faces of the two clamping arms can abut against the outer side face of a navigation mark in a matched mode; the two clamping arms are used for synchronously and reversely rotating, the navigation mark can be limited, the relative position between the navigation mark and the ship body is kept in a stable state, and the construction safety is improved in the process that a worker climbs on the buoy or gets close to the buoy from the interior of the sh