Abstract: In order to definitude the effect of doping sand on the soil structure and the salt ions content of the arable layer of salinized-alkalinized lands in Hetao irrigation areas,the field experiments and laboratory analysis were carried out in this study. The results showed that doping sand on arable layer of the salinized-alkalinized lands was benefit to the formation of major diameter soil particles.The capacity of the surface soil from 0 to 40 cm reduced significantly and the porosity of the moderately severe salinized-alkalinized lands became mild after doping sand.The total salt content of 20-40 cm soil layer was little higher than that of 0-20 cm soil layer.The content of Na^＋,Mg^2＋,Cl^- and SO4^2- of the mild salinized-alkalinized accounted for 41.6%, 26%,50% and 29.5% of the total anion,respectively.The content of Na^＋,Ca^2＋,Cl^- and SO4^2- of the moderately severe salinized- alkalinized lands accounted for 46.3%,27.5%,37.3% and 30.6% of the total anion, respectively.In severe salinized-alkalinized lands,the content of Na^＋,Ca^2＋,Cl^- and SO4^2- accounted for 43.3%,37.2%,40.1% and 27.0% of the total anion, respectively.In the moderately severe salinized-alkalinized lands,Ca^2＋ has replaced Mg^2＋ and become the main ion to lead to salty.The main ions to make the land salty were Na^＋, Mg^2＋, Cl^- and SO4^2-. It was indicated that mixing sand could improve the soil properties of the arable layer of salinized-alkalinized lands.