Abstract: The distribution of soil salinity ions content and water content of the Reaumuria soongorica desert in Alxa Zuoqi was studied, and its correlation and regression analysis were carried out. The results showed that the content of cations Na＋ was mainly in the soil salt in the Reaumuria soongorica desert of ALxa Zuoqi, and the anion was mainly SO42-. In the vertical distribution, the ion contents of Mg＋, Na＋, Cl- and SO4^2- increased with the increase of depth, whereas the contents of K~, CO32- and HCO3- decreased with the increase of depth. The soil water content of three districts like Wuliji, Changliushui and Luanjingtan ranged from 1.39% to 8.01% in Alxa Zuoqi, with an average water content of 5.02%. There was significantly linear relationship between soil water content and Mg2＋, C1- and SO4^2- of soil salinity ions in desert grasslands of Reaumuria soongorica among three districts of Alxa Zuoqi.