Abstract: The experiment was conducted to study the germination rate, germination power, germination index, vigor index of Trifolium repens seeds treated with different concentrations solution of NaCl, Na₂CO₃, Na₂SO₄, mixed salt of NaCl and Na₂CO₃, mixed salt of NaCl, Na₂CO₃ and Na₂SO₄, there were three replicates for each treatment. With the increasing of salt concentration of NaCl, Na₂CO₃, mixed solution of NaCl and Na₂CO₃, germination rate, germination power, germination index, vigor index of T. repens seeds all decreased, the restrained degree on growth of root and seedling was increasing obviously, with the increasing of salt concentration of Na₂SO₄, mixed solution of NaCl, Na₂CO₃ and Na₂SO₄, germination rate, germination power, germination index, vigor index of T. repens seeds first increased and then decreased, the growth of root and seedling decreased. T. repens seeds tolerance threshold to NaCl, Na₂CO₃, Na₂SO₄ was 300 mmol/L, 100 mmol/L, 150 mmol/L respectively.