Abstract: A simple and efficient method on one-end breakpoint localization of cable was proposed for the problem that the current cable breakpoint localization method was difficult to meet the needs of cable emergency and first-aid repair.Firstly,one-end breakpoint localization theory of cable based on electromagnetic induction was analyzed,and a solution of cable one-end breakpoint localization system was proposed.Secondly,the breakpoint detection and localization methods of singlet line cable,cable in wiring harness,and cable breakpoint under screening layer were proposed,based on quantities of experiments,data analyzing and summarizing for cable breakpoint localization screne of three cases;especially in the process of detecting cable breakpoint under screening layer,the judging relationship and rules between the cable voltage induction curves,the breakpoint loacation and the polynomial trendline was proposed when the cable breakpoint and the screen layer was non-contact.Finally,the computing method of polynomial trendline was proposed.The localization method proposed is suitable for common power cable,besides the low-voltage cable and data cable,etc,which could locate the cable breakpoint fastly within the applicative scope and is of significance and application value.