Abstract: Based on the field monitoring data about seawater intrusion and soil salinization in Suizhong sandy plain of the west of Liaodong Bay,This paper discusses the application of electric conductivity method in seawater intrusion and soil salinization.The correlation coefficient and equations of Cl--conductivity and salinity-conductivity in this areas are showed,which could offer rapid、convenient and accurate basis on analysis of seawater intrusion and soil salinization by use of conductivity method in this area.