Disclosed is an aerator structure including a floating platform, an agitating impeller and an electric motor, wherein the floating platform can float on the water surface； the electric motor is arranged above the floating platform； the driving shaft of the electric motor can penetrate the receiving platform； the front end of the driving shaft is connected to the disk body of the agitating impeller； several agitating blades having through holes are laterally installed at the periphery of the disk body； and the front end of each agitating blade is further outwards extended with a certain angle to form a front edge blade having through holes. When the electric motor is operated, partial water flow below the water surface can go through the first through holes of the agitating blade and the second through holes of the front edge blade, so as to enable the water vortex generated by the rotation of the agitating impeller to diffuse toward the periphery and upwards and inwards roll the water vortex of diffused toward the periphery during continuous rotation. Therefore, the water vortex generated is unlikely to flow downward to touch or agitate the silt of the bottom surface below the water surface.一種耘水機結構，係包含一浮台、一攪動葉輪及一電動馬達，其中該浮台能夠漂浮於一水面上，其中該浮台上方具有該電動馬達，而該電動馬達之驅動軸係能夠穿過該容置平台、並將該驅動軸前端連接於該攪動葉輪之盤體上，該盤體周緣係側立有數個具有穿透孔之攪動葉片，而每一個攪動葉片前端更以一定角度向外側延伸出有一具有穿透孔之前緣葉片，其中該電動馬達運作時，該水面下方的部分水流能夠穿過該攪動葉片之第一穿透孔及該前緣葉片之第二穿透孔，使該攪動葉輪轉動所產生的水渦流能夠向周緣擴散出去，並於持續轉動的過程中，將向周緣擴散出去的水渦流向上向內捲起，以使產生水渦流不至於向下接觸或攪動水面下方底面的泥沙。
