Abstract: In this experiment, 11 main characters of 84 imported oil flax germplasm resources at home and abroad were tested and identified under the condition of Daqing saline-alkali soil. The results showed that the coefficient of variation values of stem number（134.9%）, kernel weight per plant（65.4%） and capsule number per plant（57.2%） were more than 50%. The coefficient of variation of capsule size（6.5%） and oil content（4.1%） were less than 10%. The correlation matrix was used for principal component analysis and 4 principal components were extracted, according to which the principal component comprehensive score of each resource was calculated. The 84 imported flax resources were classified into 5 groups with Euclideam distance at the level of D=12.5. The mean values of principal component scores of all groups were were arranged in order from small to big:-0.676,-0.317, 0.909, 0.975, 3.468.