Automatic dust-free hinge hole numerical control machine

The invention belongs to the field of numerical control machine tools, and particularly relates to an automatic dust-free hinge hole numerical control machine which comprises a first support, a connecting plate, a second support and high-precision positioning units. A first support and a second support are symmetrically and fixedly connected to the two ends of the connecting plate; the high-precision positioning units are arranged on the first support and the second support; the high-precision positioning unit comprises a first end plate, a second end plate and a first screw rod; the first end plates are symmetrically and fixedly connected to the two ends of the first support; and the second end plates are symmetrically and fixedly connected to the two ends of the second support. A third motor drives a third screw rod to rotate at high precision, a first motor drives the first screw rod to rotate at high precision, and therefore high-precision free movement in the two perpendicular directions can be achieved.