The invention discloses a full-automatic inter and outer screw machining machine. The machine consists of a control system, a machining system, a vibration supply system, a vibration carrying system and a shifting system; the machining system comprises an inter screw tapping head, an outer screw tapping head and a fixed fixture; the vibration supply system comprises a supply vibration source and avibration supply disc; a spiral walking path is designed in the vibration supply disc; the vibration carrying system comprises a vibration carrying channel, a carrying vibration source, a stopper cylinder, a stopper gate plate and a detecting switch; and the shifting system comprises a vertical frame, a servo motor and a transverse slide rail, and further comprises a slide frame, a synchronous belt, a lifting cylinder, a rotating cylinder base, a rotating cylinder, a connecting plate and a finger cylinder. The machine totally realizes automatic control from pipe fitting supply and carrying toclamping and machining of inner and outer screws, can greatly improve the working efficiency, saves the production cost, reduces the reject rate, and eliminates potential safety hazards in production.