The invention discloses a ship ventilating structural assembly which comprises a ship main body. A wind inlet and a wind exhausting port are formed in the side wall of the ship main body in a spaced mode in the travelling direction of the ship main body, and the wind inlet and the wind exhausting port both communicate with a cabin of the ship main body; and fans are arranged at the wind inlet and the wind exhausting port correspondingly. The wind inlet and the wind exhausting port communicating with the cabin are formed in the side wall of the ship main body so that extra wind resistance of a ship cannot be increased, and owing to the fact that in the travelling direction, the wind inlet is formed in the front portion and the wind exhausting port is formed in the rear portion, the ventilation quantity can be increased through the wind speed generated through ship travelling to the greatest extent. Compared with the prior art, the ship ventilating structural assembly has the advantages of being simple in structure, smooth in ventilating and large in ventilation quantity.