The cold resistance of rice at different growillg stage was studied.The results show:1.The varieties and lines used in Jilin province have strong cold resistance at the beginning growing stage,but the heading time has been delated obviously under low timperature,and the delated time is quite different between varieties;2.The varieties or lines which show strong cold resistance at ear premordia stage are as follows:SHANGYU 397、JI94 B₂、TONGXI 103、CHANGBAI 7、NONGDA 3、YIMUHU;3.The varietics or lines which show strong cold resistance at middle and late growing stage under low temperature are as follows:SHANGYU 397、JI94 B₂、YIMUHU.