Punch rapid replacement structure

The utility model discloses a rapid punch replacing structure which comprises a punch positioning seat and a punch rod, the punch rod is detachably connected to the punch positioning seat, an inserting groove hole is formed in the punch positioning seat, the top end of the punch rod is connected into the inserting groove hole in an inserted mode, and the top end of the punch rod is connected with the inserting groove hole in an inserted mode. A plurality of protruding inserting pieces of an integrated structure are evenly distributed on the side wall of the top end of the punch rod, a plurality of positioning inserting grooves are evenly formed in the inner side wall of the inserting groove hole, the protruding inserting pieces are connected into the positioning inserting grooves in a sliding and inserted mode, and a plurality of protruding blocks of an integrated structure are symmetrically arranged on the two side walls of the punch positioning base. The protruding block is in threaded connection with a loc