Abstract:An experiment was carried out under the PEG-6000 simulated drought stress, to study effects of different drought stress on seed germination, seedling growth and physiological indexes for six flax cultivars. The results showed that: with the increasing of PEG-6000 concentration, germination rate, germination potential and germination index were increased at first and then decreased, and the length of the ground part and the underground part, fresh weight of the above ground part, underground fresh emphasis overall decreased; Malondialdehyde (MDA)content, peroxidase (POD) activity first increased and then decreased, Superoxide dismutase (SOD) activity,catalase (CAT) activity increased, then germination drought index declined.With the increasing of stress time,MDA content、POD activity, CAT activity, and SOD activity gradually increased at the same concentrations. Based on the 12 indexes, used the fuzzy mathematics method was used to evaluate the drought resistance of six flaxs at germination and the drought resistance followed the order of : Baxuan 3 >Jinya 11> Dingya 23 > Tianya 9. >Longya 8>Longya 11. The purpose and significance of the research lies in the evaluation of the drought resistance of the flax varieties,and provides the reference basis of the parameters and characteristics for early and quickly identifying the drought resistance of flax breeding materials indoor.