Abstract: In the paper, a dual-end location method based on the coordinated analysis of voltage and current harmonics is proposed to address the problem of fault location and low-cost application for series arc faults. This method achieves fault location by constructing a mapping relationship between fault component amplitude ratio and fault distance under feature frequency. A method based on the signal self-differential is proposed for obtaining voltage and current fault components. A voltage and current acquisition method suitable for obtaining complete signals at upstream and downstream monitoring points is proposed by designing acquisition windows of different lengths, which utilizes the distinctive characteristics of fault arc waveforms as a basis for achieving synchronization of signal periods at both ends. Compared with the existing impedance-based location methods, the method proposed in the paper is able to achieve fault location with low cost. The simulation and experimental results show that the method proposed in the paper can achieve fault location caused by series arc fault in low-voltage lines.