In order to estimate soil solidification performance of EN-1 solidifying agent,saturated hydraulic conductivities for four types of soils collected from Yangling,Ankang,Ansai,and Jingbian in Shaanxi Province were investigated by indoor simulation test with different solidifying agent contents and curing ages.Results indicated that traces of EN-1 solidifying agent added in the tests can considerably reduce saturated hydraulic conductivities of yellow brown soil and Lou soil.The saturated hydraulic conductivities decreased rapidly with the increased curing age and dropped to zero when curing age was more than 14 days.Saturated hydraulic conductivities of loessal soil and sandy soil decreased not only with the increased addition of the solidifying agent,but also with the increased curing age.The saturated hydraulic conductivities of loessal soil and sandy soil were the lowest at the 1% EN-1 solidifying agent after 28 days curing.