The effects on the germination of cucumber seeds that were treated with NaCl in different concentrations were investigated. With the concentration of NaCl increasing, the inhibition on germination increased significantly. The vigor index, germination index and lateral root of the first order of cucumber seeds were more sensitive to NaCl stress than the germination percentage. In all the 14 cultivars, the cucumber seeds of different cultivars were inhibited with different degrees during germination period. Zhongnong 12 and Jinchun 5 were tolerant to NaCl.