Abstract: Based on temperature data from 18 meteorological stations in different accumulated temperature zone（ATZ），statistics of rice yields in 1951-2012 and rice field trials in 2011 and 2012，rice yields variation and yield components were analyzed in different accumulated temperature zone in Heilongjiang province.The results showed that the annual average temperature，annual average maximum and minimum temperature increased at the rate of 0.512℃·10y-1（P<0.05），0.258℃·10y-1（P<0.05）and 0.478 ℃·10y-1（P<0.05）in Heilongjiang province respectively.The temperature was relative lower in the sixth accumulated temperature zone，but it increased obviously.And the higher linear trend ratio was，the more significant correlation with rice yield was.The correlation coefficient of the yield and yield components from high to low was GNPP（grain number per panicle）＞SSR（seed setting rate）＞NP（number panicles）＞TGW（1000 grain weight），and all of them showed significant differences except for TGW.There was significant positive correlation between the character of panicle and rice yield，which was sequencing as GD（grains density）＞NSB（number of secondary branches）＞SBNG（secondary branchesnumber of grains per panicle）＞PBSSR（primary branches SSR）＞NPB（number of primary branches）＞PBNG（primary branches number of grains per panicle）.The results could provide the basis of scientific theory for rice breeding and cultivation practices in different temperature zones in Heilongjiang province.

Key words: Heilongjiang province, Accumulated temperature zone, Climate change, Rice production, Yield components