Abstract: In order to investigate the bio-reclamation effect of different salt-tolerant herbaceous plants on coastal saline soil, and promote the development of physical and chemical properties of saline alkali soil into a virtuous circle direction, coastal saline soil hosted four salt-tolerant herbaceous plants (Sesbania cannabina, Medicago sativa, Sorghum sudanense, Suaeda salsa) in the Dagang farm of Tianjin City was researched with the saline alkali wasteland as the control. The field experiment was conducted for 2 years (2012-2013) and soil organic matter, soil available nitrogen, soil available phosphorus and soil available potassium were analyzed. The results showed that the four salt-tolerant herbaceous plants had different effects on soil organic matter, available nitrogen, available phosphor and available potassium. The content of soil organic matter showed a stable overall change, soil available nitrogen content presented a decreasing trend, soil available phosphorus overall showed a downward trend, while the soil available potassium content showed a gradual upward trend which was different from the former three. Trends of soil N/P, N/K and P/K had significant differences with the extension of the growing period of salt-tolerant plant. Suaeda salsa had the most effective function of improving the soil organic matter, Alfalfa had the most effective function of increasing the content of available N, available P and available K.