Abstract: A greenhouse experiment was carried out with the objective of evaluating the effects of peat inoculated with two types of silicate bacteria, Bacillus megaterium and B.mucilaginosus, in the amendment of coastal saline soil from Lingang, Shanghai. The result showed that coastal soils inoculated with B. megaterium or B. mucilaginosus was more efficient than non-inoculated treatments in Festuca arundinacea growth promoting of root length, shoot height, biomass and relative water content of tissue, the mean ratio of root to shoot was raised by 3.66% and 3.21% respectively. The leachate volume of 1.80 L were collected at 130% water-holding capacity of the soil, the inoculated cropped-treatments took less 3.70-6.60 min than non-inoculated cropped-treatment, also took less 23.70-26.60 min than control treatment. In comparison with non-inoculated treatment, the inoculated treatments had significantly higher concentrations of Ca²⁺ and K⁺, that subsequently removed a greater amount of Na⁺ from topsoil. The inoculated treatments had lower mean value of EC in topsoil, and the desalting process happened in inoculated treatments would not cause pH increase.