Abstract: In recent years, the construction of SGCC 5G network has been carried out gradually. 5G communication network can provide a better wireless communication solution for the development of power network due to its ultra-high bandwidth, ultra-low delay and massive connectivity. At the same time, power service terminal interconnection requires a means to provide reliable security techniques for edge computing. By analyzing the software architecture of power 5G edge computing, the ontological security of edge computing facilities, and the key technologies of security reinforcement, this paper gives the suggestion schemes for the application of edge computing security technology suitable for power 5G network, so as to promote the application of 5G edge computing security technology and improve the reliability of power 5G network.