In order to explore the emission reduction effect under different water-saving irrigation modes， field experiments and barrel simulation experiments were conducted at Jiangxi irrigation test center station for two years.The reduction of total nitrogen，total phosphorus and nitrogen and phosphorus under three water-saving irrigation modes，i.e.，flooding irrigation mode，intermittent irrigation mode and intermittent rainfall storage irrigation mode was studied.Removal effect.The results showed that，compared with flooding irrigation and intermittent irrigation，the intermittent irrigation with rain storage could significantly reduce the drainage and drainage times of early rice by 30%and 3 times respectively，and the drainage and drainage times of late rice by 100%and 1 time respectively，so as to reduce the magnitude of nitrogen and phosphorus emissions of early and late rice 15%and 35%respectively，so as to achieve the effect of reducing sewage discharge.