The invention discloses an impeller for an oxygenation waterwheel. The impeller comprises a hub and a plurality of blades arranged on the periphery of the hub in a non-radial mode. Each blade comprises a first part and a second part； each blade further comprises a guide pipe formed on the first part； the guide pipe defines a channel for air and water to circulate； thus, when the impeller operates,the impeller rotates, the guide pipe brings air on the water surface into the water surface and extrudes the air under the action of water pressure and centrifugal force to form a large number of small bubbles, the guide pipe can take water away from the water surface when the blades are separated from the water surface, water in the guide pipe is thrown out under the action of the centrifugal force, makes contact with the air and then falls into the water, and the oxygen content of the water is increased.本發明係關於一種增氧水車用的葉輪，包括一個輪轂以及非放射狀地設置在輪轂外周圍的複數個葉片，各葉片包括一個第一部份以及一個第二部份，各葉片進一步包括形成在第一部份上的一個導管，導管界定提供空氣與水流通的一個通道，如此葉輪運轉時，導管將水面上的空氣帶入水面下並且被水壓與離心力作用擠出形成數量眾多的小氣泡，並且在葉片脫離水面時導管也會將水帶離水面，並且因離心力作用將導管內的水甩出與空氣接觸後再落入水中，使得水的含氧量得以增加。
