Metal part punching die

The utility model relates to the field of punching dies, and discloses a metal part punching die which comprises a placing base, a fixed die is fixedly installed on the upper surface of the placing base, a movable die is movably arranged above the fixed die, fixing plates are symmetrically welded to the edges of the front end and the rear end of the movable die, and a fixing rod is welded between the two fixing plates at the same end. Movable parts symmetrically sleeve one side of the outer surface of the fixed rod, a first spring sleeves the outer surface of the fixed rod and is located between the two movable parts, a movable plate is hinged to the middle of the bottom end of each movable part, and supporting frames are welded to the positions, close to the four corners of the fixed mold, of the upper surface of the placement base; a first spring is matched with a second spring to resist a moving movable mold, so that the effect of conveniently buffering the moving mold in descending is achieved, the protec