This paper investigates the 5G power application status in China, and compares the mainstream communication technologies of the existing power system, such as wired, 4G, wifi, 5G and so on. Effectively combined the advantages of 5G technology with power applications, the paper clarifies the application scenarios of 5G in the power system. The research focuses on typical power applications under the background of new power system construction, including intelligent inspection, distribution network protection and control, distributed energy grid connection and dispatching stability control, and analyzes the technical indicators and economy of various typical applications. Finally, this paper analyzes the challenges faced by 5G power application, and proposes solutions, as well as prospects for 5G power application.