The peeling die of brass rod is composed of cemented carbide die, die sleeve and peeling cooling ring. The cemented carbide die is made of YG6 cemented carbide and processed into cooling zone and calibration belt, wherein β=15-21°, H1=3-5mm,H2=3-5mm; The design of the sizing belt makes the cutting edge of the pickling die contact with the surface, improves the stability of pickling, and prevents the defects of pickling ring and pickling tear. The mold can prevent the defects of skin ring, skin tear and so on, and the surface quality is better after skin pickling. The cemented carbide die is tightly bonded to the die sleeve by hot pressing