The utility model provides a bitt fills structure on ship, includes: cooperateing with boat deck, the level of being connected is lapped, the overlay board of setting on the level apron, wherein, and the last hoisting point of installing of overlay board, the base is installed to the lower part of level apron. The utility model discloses can fill the spill breach of position, not only solve the problem that proper motion module transport vechicle transported the spill breach of safety passage bitt position when going on board, and, the bitt can be amputated after the shipment and the structure is filled to reuse rolls in the dress shipment to next ship, the production cost is largely saved.