The saline soil is a special type of soil which has the engineering behaviors of salt resolving slump, salt expansion and corrosion which is harmfull to engineering.The paper used the easily soluble salt test, salt resolving slump test and salt expansion test to study and evaluate the engineering properties of foundation soil on pipeline in Dingbian supply water project. The results showed that the soil sample 1 and 2 do not belong to saline soil and have not salt resolving slump and salt expansion, and belong to non-collapsible loess.The salt content is lower than 3 g/kg. Through the result of corrosive evaluation, the soil sample 1 and 2 haven't corrosivity under dry condition;but the soil sample 1 has weak corrosivity to reinforced concrete and the soil sample 2 has not under wet condition. However, through the comparison of soil sample 1 and soil sample 2,the dry density of soil sample 2 is lower and its resolving slump coefficient is higher,so it is necessary to consider the resolving slump of soil sample 2 in design of engineering.