Abstract: Tung oil and sticky rice juice are mixed with silt, clay and BS soil (silt mixed with 15% bentonite) in proper proportion. Tung oil, with the characteristic of infiltration prevention and film formation, and sticky rice juice, with high siminess, are selected as additives. The permeabilities of all kinds of improved soils significantly decrease, by 1~2 orders of magnitude, indicating that a variety of soils can be improved by tung oil and sticky rice juice. The permeabilities of leachate and diesel exhibit no obvious changes compared with water permeability, indicating that the polymer film of tung oil is stable. The shear strength of the improved soil is reduced after drying-wetting cycle. On the whole, the improved soil has better anti-seepage property and durability.