Saline irrigation on aeolian sandy soil and "Green Great Wall" was conducted along Taklimakan Desert Highway artificial shelterbelt eco-engineering.Results showed that significant soil salts and nutrients accumulated at surface of shelterbelt,and no soil salinization(no more than 0.5 mS cm-1)at the root zone(40-60 cm).The main root extended to an average depth of 100-150 cm.More than 86.6%of the lateral roots(in terms of biomass,the same below)occur in the depth interval 20-80 cm,and no active absorbing roots were found at the salt accumulation layers(0-10 cm).In all,artificial shelterbelt with saline irrigation exerts significant action on sandy soil evolution,and saline irrigation is the sole water resource for plant growth in this area.