Clamping mechanism of punching machine die

The utility model discloses a clamping mechanism of a punching machine die, which relates to the technical field of clamping structures, and comprises a punching table and a punching die, the bottom of the punching die is fixedly connected with a plurality of positioning blocks, the top surface of the punching table is provided with positioning grooves matched with the positioning blocks, the bottom surfaces of the positioning blocks are fixedly connected with fixing cylinders, and the fixing cylinders are fixedly connected with the positioning blocks. A clamping groove is formed in the inner wall of the bottom of the positioning groove, at least two clamping pieces are symmetrically installed in the clamping groove, and the two clamping pieces can be clamped on the top curved surface of the fixed cylinder. Through the arrangement of the stamping table, the stamping die, the positioning block, the fixing cylinder and the clamping piece, the acting force of clamping installation can be applied to the fixing cy