Circular part clamping device of numerical control drilling and tapping machine

The utility model relates to the technical field of numerical control drilling and tapping machines, and discloses a circular part clamping device of a numerical control drilling and tapping machine, which comprises a drilling and tapping machine body, a main shaft, a control panel and an operation table, a sliding groove is arranged in the operation table, a rotating screw rod is rotatably connected in the sliding groove, and threads at the left end and the right end of the rotating screw rod are arranged in opposite directions. And the left end of the rotating screw rod penetrates through the operation table, a rotating handle is fixedly installed at the left end of the rotating screw rod, and two clamping plates are arranged on the upper surface of the operation table. The two clamping plates are arranged, the rotating handle is rotated, the two clamping plates are driven to move through the rotating screw rod, the left end and the right end of the rotating screw rod are designed in a reverse thread mode,