The utility model relates to a feeding device for ultra-long tubular product machining, and the feeding device is used for conveying a tubular product to be punched. The feeding device for ultra-long tubular product machining comprises a machine frame, a guide rail, a material pushing seat, a feeding lead screw, a motor box, a motor, a supporting plate and a sleeve, wherein the guide rail is fixed to the machine frame, the material pushing seat is connected to the guide rail in a sliding mode and used for pushing the tubular product, the feeding lead screw is parallel to the guide rail and connected with the material pushing seat in a threaded mode, the motor box is arranged at one end of the machine frame, the motor is arranged in the motor box and used for driving the material pushing lead screw to rotate, the supporting plate is arranged on the material pushing seat in a penetrating mode and used for supporting the tubular product, the sleeve is fixed to the material pushing seat and used for enabling the tubular product to be fixed, the tubular product is arranged in the sleeve in a penetrating mode and moves along with the material pushing seat, the supporting plate is arranged above the material pushing lead screw, and the sleeve is parallel to the guide rail. Materials are fed through the material pushing seat at set intervals, accuracy of the material feeding intervals is high, the product percent of pass is ensured, potential safety hazards are effectively eliminated, and safety of operators is ensured.