The stamping technology of the tube end workpiece was introduced. According to the shape charicteristics of tube end workpiece，the trimming-piercing die with floating die was designed．The up-side triming scrap was used as the punch of lower-side triming and the up-side triming, lower-side triming and piercing were finished at once press, which solved the strength problem of trimming die．It is proved in producition that the trimming-piercing die with floating die can ensure product quality, improve productivity more than 2 times and reduce waste rate greatly.