Suspension bridge cable installation system

The utility model provides a suspension bridge cable installation system which comprises a main tower, a pier, movable suspended scaffold walking cables, bearing cables, movable suspended scaffolds, a beam anchoring-adjusting device, lifting pulleys and a rack winch. A bearing frame is arranged at the tower top of the main tower, the bearing cables and the movable suspended scaffold walking cables are bridged on the bearing frame, two ends of the movable suspended walking cables and the bearing cables are respectively and fixedly connected at the position of the pier outside the main tower through the beam anchoring-adjusting device, the bearing cables are arranged between two movable suspended scaffold walking cables, a plurality of movable suspended scaffolds are arranged on the two movable suspended scaffold walking cables, the lifting pulleys are suspended on the bearing cables, the bearing cables and the lifting pulleys combine to form a roller rail, the lifting pulleys are connected with the rack winch through steel wire ropes, and the movable suspended scaffolds and the bearing cables form an operation platform of a cable system. The suspension bridge cable installation system has the advantages of being low in engineering cost and convenient to maintain.