Breeding crops plants for tolerating the salinity stress to prevent the yield loss under saline soil and water conditions is important. To evaluate the effects of salinity stress on agronomic traits of canola, 100 lines (95 double haploid lines and 5 spring cultivars) were planted under normal and salinity stress conditions using two 10×10 lattice designs, in 2013 at the research farm of college of Agricultural Isfahan University of Technology, located in Lavark, Najaf abad. to the salinity stress land was made by adding NaCl in a graduation concentration to 175 Mm equivalent to electrical conductivity of 16 dSm 2 to the irrigation water. The results of analysis of variance indicated the significant effects of salinity on all agronomic traits, days to flowering, period of flowering, plant height, physiological maturity, number of pods in area unit, number of seeds in per pod, 1000 grain weight, seed yield, seed oil content and oil yield. seed yield was positive and significantly correlated to number of seeds per pods,1000 grain weight and number of pods under both normal and stress conditions. cluster analysis divided the line into group under both environment, in a way that 66 lines belonged the first group and 34 lines belonged the second group in the stress conditions. In normal conditions the first group included 60 lines and the second group comprised 40 lines. Analysis of principal components indicated that the studied traits were approximately independent with a negligible relationship. The resultant by plot showed that the lines 44, 15, 16 and 27 possessing high first component (STI) and low second component as well as have higher seed yield can be in introduced as superior for growing in saline areas. The lines 90, 68, 99 and 5 had the highest amount of the second component (TOL) or salinity sensitivity showing the low tolerance potential of these lines to salinity stress. component first (STI) Based on oil yield, named salinity tolerance component. lines 44, 16, 15 and 27 the highest amount of the component first (STI) which shows the high tolerance potential of these lines to the salinity stress.by plotting the oil yield, indicated that among the factors, TOL had a high positive correlation with the second component and this component is called salinity sensitivity. Based on the second component, lines 68, 90, 99 and 71, had a high salinity sensitivity. Key word: Salt, Doubled haploid, Canola, Index.