Abstract: With the continuous innovation of national power consumption and the rapid development of power grid, the traditional manual inspection has exposed some shortcomings, such as low efficiency and difficult personnel security. In order to solve this problem, UAV technology is applied in power inspection. Through the further research of UAV technology, the application of UAV power autonomous inspection is realized. Effectively improve work efficiency, save resources and promote the sustainable development of power grid. This paper mainly discusses the realization, key technologies and current problems of UAV power autonomous inspection.