An oxygen supply device includes a diversion body, a drainage tube, and a water inlet tube. The diversion system is a one-piece structure with a water outlet. The drainage tube includes an end cover and a connecting portion. The drainage tube is penetrated in the drainage body. The end cap is connected to the drainage tube. The drainage tube, the end cover and the connecting portion are integrally formed and connected to the rear end of the flow guiding body. The water inlet pipe is connected to the outer layer of the diversion body and communicates with the diversion body. Among them, the water inlet pipe is used to introduce water flow, and the drainage pipe is used to introduce air, and the water flow introduced by the water inlet pipe and the air introduced by the drainage pipe meet in the diversion body and are led out at the water outlet end.一種供氧裝置，包含導流本體、引流管與進水管。導流本體係為一體成型結構，具有出水端。引流管包含端蓋與連接部。引流管穿設於導流本體中。端蓋連接引流管。引流管、端蓋及連接部一體成型，並連接於導流本體之後端。進水管連接於導流本體之外層並與導流本體連通。其中，進水管用以導入水流，且引流管用以導入空氣，而進水管導入之水流與引流管導入之空氣交匯於導流本體中並被導出於出水端。
