A salt-affected soil of Songnen Plain in north-eastern China was selected and a model experimentwas performed using cylindrical soil bins in an indoor test room. A straw layer is provided in the sub-soil. Resultsshowed that the capillarity from groundwater was cut off. Therefore, the rise to the soil surface of salts which weredissolved in the groundwater was prevented. Salinity of surface soil of control treatment increased to 3.57 dS m^-1 from 3.12 dS m^-1 While, it was not changed for straw buried treatment. This indicated that buried straw could effec-tively prevent soil salinization.