The invention relates to an aerator for aquaculture, which is used for moving on the liquid surface and comprises a floating structure floating on the liquid surface, a water pumping aerator and a dissolved oxygen aerator arranged on the floating structure.The water pump aerator has a water suction part under the liquid level and a water ejecting part on the liquid level； the dissolved oxygen aerator has an air suction part on the liquid level and an air ejecting part under the liquid level, and the ejecting direction of the air ejecting part is opposite to the ejecting direction of the water ejecting part, and they eject in turn.Therefore, it can achieve the effect of improving the oxygen content and aeration volume of the pool water in the whole aquaculture pond, and can also improve the oxygen content and aeration volume to a higher level because of the simultaneous use of pumping aeration and aeration dissolved oxygen.一種水產養殖用增氧曝氣裝置，用以在液面行進且包括：漂浮於液面的一漂浮結構以及設置於漂浮結構的一抽水曝氣機和一溶氧打氣機。抽水曝氣機具有位於液面下的一水吸入部和位於液面上的一水噴出部；溶氧打氣機具有位於液面上的一空氣吸入部和位於液面下的一空氣噴出部，空氣噴出部的噴出方向相反於水噴出部的噴出方向且彼此輪替噴出。藉此，可達成提升整個養殖池之池水含氧量和曝氣量的效果，且還能因為同時採用抽水曝氣和打氣溶氧兩種方式而提升含氧量和曝氣量至更高層次。
