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In order to explore the response of photosynthate production characteristics of rice to water consumption process in black soil region, the experiment was carried out by lysimeter at the rice irrigation experiment station of Heilongjiang Province in 2017. The U7（76） experiment was conducted to analyze the effects of water consumption at each stage on photosynthate production characteristics of rice. The results showed that the effect of water consumption at early tillering stage and milky stage（ET1 and ET6）on tiller rate was not significant. Water consumption from the midtillering to headingflowering（ET2~ET5）had a significant effect on tiller rate, influence order from large to small was ET4, ET5, ET3 and ET2. There was significantly positive correlation between water consumption at the late tillering stage and leaf area index. Leaf photosynthetic potential was most sensitive to ET4 response. There was significantly positive correlation between ET3 and effective leaf area rate, ET4 was significantly and positively correlated with effective leaf area ratio and high efficient leaf area ratio; ET5 was significantly and positively correlated with the maximum dry matter accumulation and population growth rate. ET1, ET3 and ET6 had no significant effect on the output rate of stemsheath matter. ET2, ET4 and ET5 had significant effects on the output rate of stemsheath matter（P<0.05）, effect order from large to small was ET5, ET2 and ET4. For the conversion rate of stemsheath matter, the effect of ET1 and ET4 on the conversion rate of stemsheath matter was not significant, the effect of water consumption at other stages on the conversion rate of stemsheath matter was significant (P<0.05). Impact order from large to small was ET5, ET6, ET3 and ET2, and the impact of ET3 on the conversion rate of stemsheath matter was negative. There were linear relationship between stomatal conductance, transpiration rate, chlorophyll content and net photosynthetic rate in the leaves, the relationship between intercellular CO2 concentration and net photosynthetic rate was quadratic function curve. The response of leaf chlorophyll content and net photosynthetic rate to ET4 and ET5 was remarkably significant（P<0.01）. There was a significant negative effect of ET3 on net photosynthetic rate. 