Abstract:In order to obtain the effect of initial moisture content and initial saline content of sulphate saline soil, and lime and fly ash content on strength characteristics of saline soil which had been modified. Based on sulphate saline soil that was prepared artificially, lime and fly ash were used for stabilizer. Factors of initial moisture content, initial saline content, lime and fly ash content were considered, and after orthogonal design, unconfined compressive strength tests of solidified soil were conducted to obtain the 7 days unconfined compressive strength. Likewise, the triaxial test of UU of partial solidified soil samples were carried out. The results indicate that initial saline content and proportion of lime and fly ash are the key factors that affecting unconfined compressive strength of solidified saline soil, and the former has a remarkable influence on it; The best scheme is composed of 17% of initial moisture content with 2% of initial saline content, and mixture with 6% lime and 18% fly ash, and its compressive strength is 0.541 MPa.