Abstract: To investigate the impact of dry density and salt content on the soil-water characteristic curve of loess-like saline soil and the stability of roadbed slopes,the filter paper method was employed to measure the matric suction of the soil under varying dry densities and salt contents.Additionally,the V-G model was utilized to derive the soil-water characteristic curve of loess-like saline soil.The maximum dry density and optimal moisture content of various soil samples were determined through compaction tests.The internal friction angle and cohesion,calculated using direct shear test results,were applied to the loess roadbed slope model established by GEO-Studio 2021 software.The study focused on the relationship between slope stability,soil dry density,and salt content.The study revealed that the residual moisture content of the test soil rises with the increase in dry density and salt content.When the dry density remains constant,the parameter α (a fitting parameter associated with the air intake value) fluctuates within a narrow range as the salt content increases,suggesting that the influence of salt content on the air intake value is not significant.With the increase in salt content,the internal friction angle and cohesion of the soil decrease,but overall,they are minimally affected by the salt content.Slope stability is positively correlated with dry density but negatively correlated with salt content.The stability of slopes experiences the most significant decrease in the first 3 days under varying rainfall conditions,followed by a gradual decline.Additionally,heavy rainfall over a short period of time exerts a greater impact on the stability of loess slopes.