Abstract: By using systemic observation data of 88 meteorological stations in Xinjiang from 1961 to 2005,several elements were analyzed,including the first and the last dates of which daily mean air temperature steadily passed 0℃,days between the first and the last dates,the spatial and temporal change of accumulate temperature.The results showed that accumulate temperature of Xinjiang and all regions had a tendency of increase,it increased 43.1℃ per decade in all regions in Xinjiang.Tacheng Basin had the highest value with 89.6℃ per decade on average.Days between the first and the last dates in all regions had a tendency of increase.The first date changes differently: it's delayed in north Xinjiang(except Yili valley),Tianshan moutain and Hami basin.It's advanced in south Xinjiang,Yili valley and Naomaohu basin,and the last data in south Xinjiang,Yili valley and Naomaohu basin tended to postpone.By analyzing the spatial and temporal change of accumulate temperature of 0℃,it not only could help to know the distribution and change of heat resource in Xinjiang,but also had important meaning for reasonably distribution of crop and developing and using climate resource.

Key words: Xinjiang, 0℃ critical temperature, Accumulated temperature changes