Dock ladder shift device

The utility model discloses a port ladder moving device, belonging to a ship used deck machinery. The port ladder moving device comprises a port ladder, a platform seat and a ship gunwale, wherein the upper end of the port ladder is directly connected with the upper element of the platform seat correspondingly, the bottom portion of the platform seat is equipped with a lengthwise U shaped dent with a downward opening, the lengthwise U shaped dent of the platform seat is matched with gaps inside the ship gunwale to form a rail structure, the platform seat can be moved along the ship gunwale, the platform seat comprises a platform and two groups of pulling bar seats on the upper surface fixedly connected according to the distributed port width, an eye hole and a fence seat, wherein the inner side face of the lengthwise U shaped dent on the platform seat is equipped with a locking bolt, two sides of the platform is equipped with an adjusting supporting of a thread compact structure. The utility mode has reliable