Abstract: A built-up puncher comprises of a pressure plate, a stand body and a bottom block, wherein the stand body is having a plurality of fixed supports mounted thereon for setting therein of a plurality of eye-letting means respectively. The fixed supports each is having a front extension with an opening and two notches made thereon to match with the retaining slots of the pressure plate so as to make the mounting and dismounting of the pressure plate onto and from the stand body become easy.