Abstract: Transmission lines have been operating in the open air for a long time, and due to their own defects or the influence of changes in the surrounding environment, trips and even interruptions in power supply often occur. Quickly searching for fault points and understanding the situation of line faults can effectively buy time for emergency repairs and power restoration. This article analyzes the types and characteristics of common faults in transmission lines, explores scientific methods for fault detection, and summarizes measures for rapid transmission line fault points.