In order to improve water-saving irrigation and eggplant yield , irrigation modes were designed as seeding stage, flowering period, fruit maturation stage with different irrigation low limits to explore the effects of different irrigation low limits at each growth periods on growth. The result show that: the plant height, stem thick, leaf area, above biomass, total root length, fresh root weight and dry weight are decreased when the irrigation low limits reduced. Compared with normal irrigation, the influence of growth, yield and the water use efficiency is insignificant by appropriately reducing the irrigation low limits in seeding stage and flowering period. The most sensitive stage to soil moisture is fruit maturation stage. the influence of growth, yield and the water use efficiency is significant then we are reduced the irrigation low limits. Taking into account irrigation amount, growth, production, water use efficiency, the most appropriate irrigation limits are 60% in seeding stage, 65% in flowering period, 70% in fruit maturation stage.