The utility model relates to a novel desulfurized seawater aeration device belongs to environmental water and handles the field. A novel desulfurized seawater aeration device, includes: the equalizingbasin, the aeration tank, the both ends of aeration tank are equipped with inlet channel and drainage pipe respectively, the inlet channel connects the delivery port of equalizing basin through linemixer, the aeration tank is the enclosed type aeration tank, and its top is equipped with gas vent A, gas vent A connects through alkaline tourie line mixer, the inside membrane module that is equipped with in aeration tank, the air inlet of membrane module passes through blower connection oxygen generator. The utility model discloses a closed hydrophobic membrane aeration method handles desulfurized seawater, not only can improve the utilization efficiency of oxygen, reduces aeration rate and consumption of power, and secondary pollution is avoided in can avoiding the gaseous entering atmosphere of sulfur dioxide to the while. Simultaneously the utility model discloses be equipped with emergent gas secondary dissolving device, be favorable to make full use of oxygen.