Workpiece fixing device for numerical control machine tool

The utility model discloses a workpiece fixing device for a numerical control machine tool, which comprises a mounting plate used for mounting and fixing the position of the whole device, the top of the mounting plate is fixedly connected with a fixing frame used for limiting the position of an internal clamping and fixing mechanism, and slotted holes are symmetrically formed in the top of the fixing frame close to the middle position. And sliding rails are symmetrically and fixedly connected to the side walls, close to the groove holes, of the top of the fixing frame, stable sliding of the clamping blocks is facilitated, a fixing plate is connected to the positions, close to the side walls, of the inner top of the fixing frame through bolts and used for stably rotating the two-way threaded rod, and a clamping and fixing mechanism is fixedly connected to the top of the mounting plate. The clamping and fixing mechanism comprises a motor. The automatic clamping and fixing device is arranged in the fixing device