Workpiece clamping device of numerical control machine tool

The utility model discloses a workpiece clamping device of a numerical control machine tool, which relates to the technical field of clamping devices, has the advantage of being convenient to clamp a cylindrical workpiece, and is characterized by comprising a fixed plate and two movable plates which are horizontally connected to the top end of the fixed plate in a sliding manner through movable pieces, and the top ends of the two movable plates are provided with placing grooves; the sides, close to each other, of the two moving plates are each provided with a plurality of grooves communicating with the containing groove, the interiors of all the grooves are horizontally and slidably connected with abutting plates, the ends, away from the containing groove, of all the abutting plates extend out of the grooves and abut against the workpieces, and the ends, away from the workpieces, of all the abutting plates extend into the containing groove. At the moment, fixing pieces used for fixing the positions of the abu