The utility model relates to a shipbuilding technical field, concretely relates to a can improve ship structure of boats and ships unsinkability. Its hull that includes hollow setting of this ship structure is equipped with the sealed hollow chamber of a plurality of mutually independent in the cavity of hull, hull department is equipped with high -pressure gas generating device, and high -pressure gas generating device all is equipped with the gas supply line with arbitrary sealed hollow chamber piece, and high -pressure gas generating device is used for through the gas supply line to sealedhollow intracavity input high -pressure gas. Should anti heavy method set up the sealed hollow chamber of a plurality of mutually independent in the hull cavity, and set up a high -pressure gas generating device at the hull, and all set up the gas supply line between arbitrary sealed hollow chamber and high -pressure gas generating device, high -pressure gas generating device is used for through corresponding gas supply line to this a certain sealed hollow intracavity input high -pressure gas when the damage of a certain sealed hollow chamber. The utility model discloses reliable and simple, ship lifting's unsinkability greatly.