Abstract: Rumex（Rumex patientia × R. tianschanicus CV. Rumex） is a kind of high yield and high-quality herbage with salinity tolerance, cold resistance, strong adaptability and fast growth rate. In order to find out the salt-tolerance ability of F₂ generation seeds of Rumex, two kinds of neutral salt and two kinds of alkaline salt were combined in this experiment, and each combination was set with different concentrations（20, 40, 60, 80, 100, 120 mmol/L） to simulate 30 kinds of saline-alkali stress. Domestic varieties were taken as the control, and the seed germination rate, germination indexes and physiological and biochemical indexes of introduced varieties and their F₂ generation seeds were studied.The results showed that the low concentration of mixed saline-alkali stress had no significant effect on seed germination, while high concentration inhibited seedling growth; and under 80 mmol/L combined saline-alkali stress, both the introduced varieties and F₂ generation seeds could germinate, but the control could not; The activities of SOD, POD and MDA contents of three different seedlings increased at first and then decreased with the extension of treatment time, while the contents of chlorophyll showed the opposite trend.The salt-alkali resistance of Rumex F₂ generation seeds was similar to that of their parents, which had a certain salt-alkali resistance, and the seeds were suitable for planting in 60 mmol/L mixed saline-alkali soil.