Metal cutting machining device

The invention discloses a metal cutting machining device. The metal cutting machining device comprises a device body, a clamping device and a cutter, wherein the device is characterized in that a moving device is arranged in the middle of the top end of the device body, the moving device is in transmission engagement with a toothed plate fixedly installed on a T-shaped block, a cutter holder is fixedly installed at the bottom end of the T-shaped block through a lifting device, a cutter is rotationally installed below the cutter holder, a clamping device is arranged below the cutter, the bottomend of the clamping device is rotationally installed in an installing base through a first rotating shaft, a plurality of limiting grooves are formed in the lower portion of the side edge of the clamping device, limiting pins are arranged in the limiting grooves in a sliding manner, the other ends of the limiting pins are fixedly connected with sliding plates, springs and T-shaped rods are arranged on the sides, away fro