At present, the strength of the country's rapid development is increasing. In order to meet the current development needs, higher requirements are put forward for power transmission, and it is necessary to maintain high-voltage input and long-distance transmission. In the process of modernization, many transmission lines will be built. In order to ensure daily safe operation, it is necessary to strengthen the maintenance of line safety, and the importance of power line inspection is highlighted. In the traditional way, special personnel need to be assigned to inspect the line to keep abreast of the potential safety hazards of the line, solve the problems existing on the line in time, and strengthen prevention to avoid safety accidents. Not only does it need to invest a lot of human and material resources, but also the efficiency and quality cannot be guaranteed due to various factors. In particular, the inspection of ultra-high voltage lines is relatively difficult, and the effect of the traditional inspection process is relatively poor. Therefore, airborne lidar technology is widely used in modern development.