Abstract: Interrelation was analyzed between meteorological conditions in different growth stages and yield components in Xinyang with hybrid rice Shanyou 63. The study showed the ear-bearing tiller percentage became higher while the ratio of productive tiller was about 300%, and appropriate daily mean temperature was 26℃, sunlight duration was 5.5h; panicle number was in direct ratio to sunlight duration in tillering stage, and it was not obvious for the change of panicle number while the sunlight duration was above 5h; there was a high panicle Number in booting stage while the temperature was from 28℃ to 30℃, and the daily range was from 8℃ to 10℃; high temperature (>30℃) and sunlight deficiency (<5h) would decrease the rice seed setting rate remarkably; the total sunlight duration, precipitation and daily range all had effects on the rice grain weight; the importance of each yield component was as follows: seed setting rate>panicle number>grain weight.