A pot culture experiment was carried out in glasshouse to investigate effect of soil moisture and phos-phorus (P) on water consumption and water use efficiency by paddy rice cultivated in aerobic soil.The results obtained were as follows.Soil water and P fert ilization rate had significant effect on water consumption and water use efficiency by paddy rice, and there was also a significant interaction between them.The highest water consumption is at middle soil moisture to high soil moisture and middle P supply to high P supply.Thus, water consumption percentages in the total water consumption during the whole growth stages were 15%~18%, 63%~68% and 16%~21% at early growth stage, middle growth stage and later growth stage, respectively.The highest water use efficiency(1.25~1.60 g L^-1) by rice in seedling period was got at low to middle soil moisture and low to middle P supply while the highest water use efficiencies by rice in middle(2.22~3.56 g L^-1) to later stage (1.68~2.08 g L^-1) were found at low to middle soil moisture and middle to high P supply.The order of water consumption and water use efficiency by rice in different growth stages were as follows: growth middle stage> later stage> early stage.The results obtained in this experiment could provide the theoretic base of water and P management of paddy rice grown in aerobic soil in the southern hillock areas of China.