[en] With the continuous improvement of people’s living standard, the consumption of electricity also increased, which requires a larger capacity of the conductor for electricity transmission. Therefore, comprehensive selection of conductor type made higher requirements. Based on the analysis, this paper divides the basic indication of conductor selection into two types: cost type and efficiency type, then each category is divided into a number of specific indicators based on needs, finally, using the grey relational analysis method to compare and analyze the cost indication and efficiency indication of conductors, which draws the optimization scheme of conductor selection, and is used to guide the type selection of conductor type. (paper)