Cold punching punch

The cold punching punch comprises a die steel body and a tungsten steel punch, a groove is formed in one end of the die steel body, the width of the bottom face of the groove is larger than that of an opening in the top end of the groove, a protruding block matched with the groove in shape is arranged at one end of the tungsten steel punch, and the protruding block of the tungsten steel punch and the groove of the die steel body are fixed in an inserted connection and matched mode. A die steel body and a tungsten steel punch are matched in a welding mode, a cold punching punch in the prior art is made of die steel which is short in service life and poor in abrasion resistance, compared with a tungsten steel material, the cold punching punch is good in abrasion resistance and long in service life, however, tungsten steel has the defect of high cost, and therefore the whole tungsten steel punch is high in production cost. If the die steel and the tungsten steel are directly spliced and then welded to form the p