Abstract: The plant grow up mainly rely on nutrient liquid in plant factory, but in the long-term use of nutrients in the process can cause many harmful effects of miscellaneous bacterium, crop quality and production. At present, the Netherlands and other countries have common used ultraviolet disinfection, and of nutrient for automated equipment, while China used more chemical pesticide to disinfection. In view of the above situation, we developed a nutrient recycle equipment, not only realize the efficiency and security nutrients, but also realized automatic and intelligent management of disinfection of nutrient composition.