Evaluation of the salt tolerance on existed rapeseeds germplasms is the primary work for breeding salt-tolerance varieties. 203 accessions of three cultivated species of rapeseeds including B. juncea, B.rapa, B.napus were stressed by three NaCl concentrations (86mmol/L, 170mmol/L and 256mmol/L) and the germination rate (GR) was checked at germination stage. The results showed the GRs of three species were all inhibited but with different degrees under salt stress and B.rapa performed best, which followed by B. napus and B. juncea sequentially. Fourteen lines with good GRs were then stressed by gradient NaCl concentrations and results indicated that the GRs of three species decreased as the Boltzmann curve with the increasing NaCl concentrations, and B.rapa did most slowly all the time. Six physiological characters including germination index, germination rate, germination potential, root length, hypocotyl length, plantlet fresh weight, up-ground fresh weight, total chlorophyll content and electrical conductivity of the fourteen lines under the stress of three NaCl concentrations mentioned above were detected. It approved that the general salt tolerance of B.rapa was better than B. juncea or B.napus. The Principle Component Analysis (PCA) of the trait values under 170mmol/L NaCl stress revealed Br2 of B.rapa and Bn1 and Bn3 of B.napus were the best salt-tolerant germplasms which could be used in the future breeding application.