An adjusting structure of an oxygen supply pipe body includes a tubular body, a thread, and a flow guiding portion. The tubular body is connected to the outlet end of the oxygen supply pipe body. The thread is located on the outer wall of the tubular body and is used for locking at the outlet end. The deflector is located at one end of the tubular body and is used to form a gap with the drainage tube. Therefore, the size of the gap is used to control the flow velocity and strength of the water flow.一種供氧管體之調節結構包含管狀本體、螺紋與導流部。管狀本體連接供氧管體之出口端。螺紋位於管狀本體之外壁，用以鎖設於出口端。導流部位於管狀本體之一端，其用以與引流管形成間隙。藉此，利用間隙大小以控制水流流速與水流強弱。
