The utility model discloses an oxygen rifle body repairing tool belongs to oxygen rifle equipment technical field to solve the internal screw thread of oxygen rifle harmd with the screw thread in mixwith impurity, be difficult to with nozzle threaded connection, reduce life's problem. The instrument includes screw tap body, tool bit and toggle, and the periphery equipartition of screw tap body has the several tool bit, is equipped with powder flow channel between the tool bit, is equipped with the patchhole on the screw tap body, and the screw tap is worn to locate through the patchhole by the toggle, and this is internal. The utility model relates to a tool bit with oxygen rifle internal thread looks adaptation physically to the screw tap body is rotated in the connection of leading to the over twisting arm of force and patchhole, thereby rotates the in -process in the repair and repair the internal thread, and clears up the impurity such as red copper of the embedded income of internal thread, makes the enough and nozzle of oxygen rifle physical stamina with screw mode reconnection, improvement oxygen rifle and nozzle life.