The invention discloses a stamping die comprising an upper die base, a pressing core, a lower die base, a female stamping die and a male stamping die; the female stamping die is matched with the male stamping die by a tapered wedge, two sides of the pressing core are fixedly provided with pressing core supporting seats, each of the pressing core supporting seats horizontally extends out of the pressing core, and each of the bottom end of each pressing core supporting seat and the top end of the upper die base is provided with a balance weight; each balance weight comprises a locating block and a tapered guide part arranged in the middle of the locating block, and the tapered guide part is upwards protruded out of the top end surface of the locating block; the top end surface is used as a first locating surface of the locating block, and the bottom end surface of the locating block is used as a second locating surface of the locating block; and after stamping is completed, the upper and lower tapered guide parts are spliced and matched, and the first locating surface is just in horizontal contact with the second locating surface. The stamping die is simple in structure and low in cost; due to the adoption of a pressing core mechanism with the tapered balance weights, a lateral force generated during die closing is effectively buffered; and meanwhile, the pressing condition inside the pressing core can be monitored externally by virtue of the balance weights.