Rice is one of the most important grain crops in both China and Sichuan. The rice yield and its components were affected significantly by climate change. Therefore,the study of the role of climate factors in rice yield formation at different growth stages could provide scientific references for disaster loss assessment. On the basis of rice region division and growth stages,the dates of rice growth stages and data of rice yield components from 1980 to 2012 at 24 agro-meteorological observation stations and 2 agro-meteorological experiment stations were used to analyze the impacts of climate change on rice yield and its components by linear regression and correlation analysis. The results showed that the percentage of unfilled grains had a negative correlation with the temperature and precipitation during booting stage and heading stage. The grains per spike correlated positively with the minimum temperature and precipitation during booting stage and heading stage. And the 1000-grain weigh had a negative correlation with both the minimum and maximum temperature.