Punching die

The utility model belongs to the technical field of stamping equipment and discloses a punching die which comprises an upper die body and a lower die body, the upper die body comprises a pressing block, a first arc surface is arranged at the lower end of the pressing block, the middle of the first arc surface is concaved inwards to form a circular groove, the bottom face of the circular groove is a circular plane, and the middle of the bottom face of the circular groove protrudes downwards to form an oval punch. A first groove is formed in the fixing shaft, a male die and a first supporting block are arranged in the first groove, a second arc face, a plane and an avoiding hole are arranged on the upper end face, corresponding to the lower end of the pressing block, of the male die, a first spring is arranged between the bottom of the first supporting block and the bottom of the first groove, and in the initial state, the upper end face of the first supporting block is higher than the upper end face of the mal