A kind of water inlet pipe of apparatus of oxygen supply includes tubular body. Tubular body has central axis. The outer layer of what apparatus of oxygen supply is obliquely arranged in one end of tubular body, and is connected to apparatus of oxygen supply. Wherein, tubular body is connect with connecting line. Connecting line flows into tubular body to guide water. Wherein, apparatus of oxygen supply has axle center, has angle between the central axis of tubular body and the normal in vertical what axle center. It uses, makes water flow injection apparatus of oxygen supply Hou that can form vortex and export, promote the range of flow intensity and oxygen supply.一種供氧裝置之進水管包含管狀本體。管狀本體具有中心軸。管狀本體之一端傾斜地設置於供氧裝置之外層，並與供氧裝置連通。其中，管狀本體與連接管路連接。連接管路用以導引水流入管狀本體中。其中，供氧裝置具有軸心，管狀本體之中心軸與垂直於軸心之法線之間具有夾角。藉以，使水流注入供氧裝置後可形成渦流而導出，提升水流強度及供氧的廣度。
