Abstract: Based on the climatic data from 1951 to 2008 and the crops growth stages record data from 1992 to 2010 in Songnen plain and its surrounding areas,the temporal and spatial variation characteristics of the key climatic factors and main crops growth stages were studiedThe results showed that the climate changes in Songnen plain for nearly 60 years was very obvious,the temperature increased on average about 1.79 ℃,the accumulated temperature ≥ 10℃ increased on average about 228 ℃〖DK〗·d and the lines of 2700,2800 and 2900 ℃〖DK〗·d moved to north about 100～240 km,the precipitation and relative humidity both decreased and these two factors in western Songnen plain varied significantly than that in the eastern area,the sunshine hours increased in the north area and decreased in the south〖JP+1〗Overall,the climate changes made different influences on these major dryland crops,then the soybeans growth stages delayed obviously，and the second was spring corn，the spring wheats growth stages delayed the least in the southern and western Songnen plain.

Key words: Songnen plain, Climatic factors, Dryland crops, Growth stages