In order to explore the germination characteristics of Lolium perenne seeds under different salt and alkali stress, the method of germination on dish paper was used to treat ryegrass seeds with different sodium salt solutions（NaCl, NaHCO₃, NaCl and NaHCO₃ mixture）. Eight concentration gradients of 0（control）, 40, 80, 120, 160, 200,240, 280 mmol/L were set to detect the changes of germination indexes of Lolium perenne seeds. The results showed that the germination rate, germination index and vigor index of Lolium perenne seeds decreased with the increase of salt and alkali stress concentration. When the concentration of Na⁺ was equal, the indexes under NaCl treatment were higher than those under NaHCO₃ treatment; the germination potential was promoted by the lower concentration（40 mmol/L） and inhibited by the higher concentration（120/160/200 mmol/L）, but decreased under NaHCO₃ treatment; the relative salt injury rate of Lolium perenne seeds perform as NaCl ＜ mixed salt ＜ NaHCO₃, which indicated that NaHCO₃ had a more significant effect on Lolium perenne seeds than NaCl.