The influence of chlorine ion on lixiviation and the accumulation of chlorine ion in leaching liquor in the in-situ leaching of uranium with sodium chloride solution as eluant is tested and analyzed in this paper.Test results show: the resin can be made to turn into chlorine type basically when the NaCl content of eluant is more than 28 g/L,only if the stated chlorine ion content of liquid phase is kept in the course of eluent solution,the qualified liquid of higher uranium content can be gotten;the Cl-content of the product can be reduced by washing when NaCl is used as eluent;the uranium-adsorbing capaty of resin drops with the increase of chlorine ion content of adsorption liquid;when the chlorine ion content of adsorption liquid is larger than 2.5 g/L,the uranium-adsorbing capacity of resin drops by 20% more,the influence of chlorine ion content on uranium adsorption is not obvious when the chlorine ion content is less than 1 g/L.