At elongating and harvesting stages,under no nitrogen fertilizer and using nitrogen fertilizer condition,the difference of nitrogen absorption and utilization in sixteen wheat varieties was studied,using split experiment.Results showed that,nitrogen absorption and utilization in tested genotypes had great difference from each other.Correlation analysis showed that,nitrogen absorption was the key process in whole growth period under nitrogen stress condition.According to relative nitrogen absorption amount,relative nitrogen utilization efficiency(ratio of control and treatment),16 genotypes were divided into 5 groups: both high variety,high absorption variety,high utilization variety,both low variety and middle variety.This could offer theoretical foundation for high efficiency wheat breedings.