In this paper,the water stability is studied by adding different proportions of lime and water glass to the silty soil in Taizhou. The results show that the water stability of the improved soil is very poor when the content of lime is low (1%),and that the water stability of silt can be improved by increasing the content of lime or the amount of water glass after soaking 24h. The increase of lime content is more significant for the improvement of the water stability of silty soil. The amount of lime content is the same,the higher the amount of water glass,the higher the capillary water absorption rate of lime and water glass modified soil,the higher the amount of lime content,the better the capillary water absorption speed of lime and water glass improved soil. When the amount of lime content is low (1%),the erosion resistance of the modified soil is poor. The damage of the specimen after 4h erosion is serious,so the increase of lime content can effectively improve the erosion resistance of the soil.