Abstract: The experiment was performed to study the effects of zeolite added on the growth and ionic contents of cucumber seedlings under NaCl stress. Results indicated that addition of zeolite increased stem height and diameter, leaf area and total dry weight of cucumber seedlings under NaCl stress. Photosynthetic pigment contents also increased, E, Pn and Gs increased but Ci decreased; SOD, POD activity and Pr contents also increased; contents of K, Mg in dry weight of roots, stems and leaves,contents of Ca in dry weight of stems and leaves increased,but contents of Na in dry weight of roots, stems and leaves decreased. All the indexes indicated that the application of zeolite can reduce the NaCl stress on cucumber seedlings at the stated concentration.