The utility model belongs to a mould punching pin for forming die is pressed in die forging, this mould punching pin includes the upper die base that links to each other with the press slider, the terrace die continuous with the upper die base, is equipped with the drift that punches a hole that passes the terrace die in the upper die base, the length that has simple structure, reasonable in design, mould punching pin can change to to work piece the shape complicated and big part of atress carrying out secondary stamping, thereby guarantee that the part of work piece atress reaches the compaction and is full of, the effectual advantage that improves holistic mechanical properties of work piece and life.