Abstract: As the terminal link directly connecting the power grid and users, the distribution network has a large number of lines and a complex layout. Its safe and stable operation has an undeniable impact on the efficient operation of the power grid and the user experience. In response to the demand for improving the fault location accuracy of overhead lines in distribution networks, this paper proposes an accurate fault traveling wave location method based on the traveling wave ranging type magnetron switch and ALACEEMDAN-GTKO algorithm. The current signal is collected in real time by using the specially designed transformer module in the traveling wave ranging magnetic control switch. The high-frequency traveling wave current signal is extracted after preprocessing, and then the faulty traveling wave head is accurately calibrated through the ALACEEMDAN-GTKO algorithm to achieve precise fault locking. The actual collected historical data verification shows that this method can significantly improve the fault location accuracy of distribution network lines, providing strong support for the rapid repair of faults and the enhancement of power supply reliability.