The utility model relates to an internal thread automatic processing device has solved the high problem of internal thread pipe fitting manufacturing cost. An internal thread automatic processing device, includes blowing device, workstation, material collecting device, forming device and a tensile dish device, forming device with tensile dish device sets up respectively on the workstation, the blowing device forming device tensile dish device with material collecting device links up in proper order, forming device includes frame, motor, the stretching device that moves about, spinning shaper and finishing sizing device, the frame is connected on the workstation, the motor move about stretching device the spinning shaper with finishing sizing device is connected respectively in the frame.