Abstract: To solve the problem of resources shortage of ordinary river sand in northwestern of China,the aeolian sand of Kubuqi Desert was used instead of ordinary river sand as fine aggregate to prepare aeolian sand concrete.The effects of different water-binder ratios and different concentrations of NaCl solutions on the permeation patterns of water and chloride ions in aeolian sand concrete,the chloride ions content was determined by means of stratified borehole powder extraction and chemical titration to explore the connection between water and chloride ions transport under capillary action.The results show that water as a medium of chloride ions transport,the penetration depth of chloride ions is much smaller than the penetration depth of water,the two transport presents non-synchronous.After 28 days of capillary absorption,the water-binder ratio of aeolian sand concrete is 0.55,and the water penetration depth is about twice the chloride ion penetration depth,and the water-binder ratio is 0.45 and 0.40.The water penetration depth of the aeolian sand concrete specimen is about 1.5 times that of the chloride ion penetration.When the capillary absorption of more than 7 days,aeolian sand concrete specimens with the water-binder ratio of 0.55 generates a large number of salt crystals inside,which slows down the rate of water penetration.In the early stage of capillary salt absorption,the internal water and chloride ions penetration depth of the aeolian sand concrete specimen is nearly linear,with the capillary absorption time,the water migration rate inside its matrix decreases,and the chloride ions continues to penetrate deeper by diffusion under the effect of high concentration gradient.When the capillary salt absorption concentration exceeds the critical value of 6%,the chloride ions penetration inside the aeolian sand concrete specimen does not increase with the increase of NaCl concentration.This research can provide a theoretical basis for the research on durability of aeolian sand concrete in water conservancy projects in Northwest of China.