Effects of post-anthesis irrigations on carbon and nitrogen assimilate translocation in high-oil corn were investigated in field experiments.Three water treatments were established from anthesis to maturity,i.e.no-irrigated,irrigated once,irrigated third.The results indicated that post-anthesis irrigations reduced the amounts and remobilization rate of pre-anthesis stored assimilates and nitrogen,total amount of pre-anthesis stored assimilate and nitrogen.Nitrogen increased amounts and remobilization rate of pre-anthesis stored assimilates in leaves,stem and sheathes significantly decreased with the increase of irrigation times from 0 to 3.It was reduced amounts and remobilization rate of pre-anthesis stored nitrogen in leaves,amounts of pre-anthesis stored nitrogen in stem and sheathes,total amount and remobilization rate of pre-anthesis stored nitrogen,nitrogen accumulation in grains and the translocation of pre-anthesis accumulated nitrogen into grains with irrigation.The amounts and remobilization rate of stored nitrogen and assimilate of pre-anthesis much more bigger than post-anthesis's.The grain yield,starch yield,protein yield and oil yield is high when high-oil corn is just irrigated once during later stage.Irrigation favored oil content,but reduced protein content.The results indicated that irrigation regulated translocation of carbon and nitrogen assimilate and sequentially regulated accumulation of grain starch,protein and oil in high-oil corn from anthesis to maturity.Some suggestions were also put forward for realizing high yield and quality of high-oil corn and increasing water use efficiency(WUE) in high-oil corn cultivation.