Abstract: Using integrated technology of water，fertilizer and pesticide for drip irrigation under plastic film，water，fertilizer and pesticide integration device for leafy root vegetable can accurately deliver the best proportion of irrigation water，fertilizer and pesticide to plant roots through pipes according to different characteristics of each stage of growth cycle of leafy root vegetable.This device can improve efficiency of water and fertilizer utilization，improve crop yield and quality，reduce labor intensity，reduce the harm of diseases and insect pests，improve soil environment，and realize coordination of economic and ecological benefits at last.