Abstract: Long term operation of transmission lines in the open air may result in loose bolts and nuts, rust, and missing pins in the connecting fittings. These defects seriously threaten the safety and stability of the power system. Live working can avoid load losses caused by power outages and quickly eliminate defects and hidden dangers, laying the foundation for the smooth operation of transmission lines. This article explores and analyzes the practical application of unmanned aerial vehicle and electric lifting devices in live working, and summarizes safe and efficient live working methods.