The invention relates to the technical field of ship manufacturing, in particular to a ship structure and a sinking-resisting method both capable of improving the sinking resistance of a ship. The ship structure comprises a hollow hull; a plurality of mutually-independent sealed hollow cavities are formed in a cavity of the hull; a high-pressure gas generating device is arranged at the hull; a gassupply pipeline is arranged between the high-pressure gas generating device and any of the sealed hollow cavities; and the high-pressure gas generating device is used for inputting high-pressure gasinto the sealed hollow cavities through the gas supply pipelines. According to the sinking-resisting method, the multiple mutually-independent sealed hollow cavities are formed in the cavity of the hull; the high-pressure gas generating device is arranged at the hull; each gas supply pipeline is arranged between any of the sealed hollow cavities and the high-pressure gas generating device; and thehigh-pressure gas generating device is used for inputting the high-pressure gas into the certain sealed hollow cavity through the corresponding gas supply pipeline when the certain sealed hollow cavity is damaged. The ship structure and the sinking-resisting method are simple and easy to implement, and the sinking resistance of the ship can be greatly improved.