Ventilating and filtering device of offshore wind power tower tube

The utility model relates to a ventilating and filtering device of an offshore wind power tower tube. The device is characterized in that a wind inlet and a wind outlet are formed in the outer wall of the offshore wind power tower tube, the wind inlet is formed in the lower part of a tube body of the offshore wind power tower tube, and the wind outlet is formed in the upper part of the tube body; a filtering box (1) is arranged on the outer side of the offshore wind power tower tube and communicated with the wind inlet through a wind inlet pipeline (4), and an intake fan is arranged in the wind inlet pipeline (4); an exhaust fan (6) is arranged at the wind outlet; a plurality of salt mist filters with filtering fineness increasing gradually are sequentially arranged in the filtering box (1) in the air flow direction. According to the device, a perfect ventilating and filtering circulating system is provided for the tower tube of an offshore wind turbine; the integration level is high, and the precious occupied space is saved; meanwhile, salt in the offshore air is filtered effectively, and corrosion to metal components and parts in the tower tube is prevented.