Five different drought models were set up to study the effect of drought on water consumption and yield formation of rice in different growth stages.The results showed that there was a significant correlation between the water consumption of rice and the drought model，and the drought treatment at the jointing and booting stage had the greatest impact on the total water consumption of rice in the whole growth period.The effect of drought treatment in different growth periods on tiller number of rice is different.In the tiller period，the number of tillers will decrease，and it will be alleviated after normal irrigation in the next growth period，but not after jointing and booting period.In a single growth period，the yield reduction of rice is not obvious under light drought，and the growth period that is most affected by drought is jointing booting period and heading flowering period.