The material is dived into high-speed rotary tray centre through centrifugal force. The material do constant speed circle movement on inter wall of out ring. The material is cut into pieces through fixed cutter. It is applied in processing rootstock, fruits, seeds medicinal materials. Such as Pinellia tuber, fritillary, dried rehamannia root and so on. It can sequence work, high efficiency, automatic charging, the fineness of cut within 2%, pretty cut pieces, simply clean, operated simply, simply maintain, un-polluted materials .It meets the requirements of GMP.