The principle and characteristics of spray drying granulator (one-step granulating equipment) is a new type of proprietary Chinese medicine, which combines spray drying technology with fluidized bed granulation technology. The device includes mixing, spray drying, granulation, granule coating functions; can produce micro materials, traditional Chinese medicine products in low doses, no sugar or low sugar; instant powder particles, easy to dissolve, easy disintegrating tablets, conforms to the requirements of GMP. In the aspects of granulation rate, particle quality and automation level, an important step has been taken to the international advanced level.