摘要:Based on some key characteristics of 5G and blockchain, we analyze the technical feasibility and necessity of combining 5G and blockchain in IoT construction. We prove that the combination of 5G and blockchain can effectively improve network and data security of 5G by discussing the practical problems that can be solved by this method(including distributed deployment of network platforms, slicing management, network security authentication, spectrum resource management, data sharing security), while moderately reducing network complexity. Finally, we discuss the application of 5G and blockchain combined technical architecture in the construction of the Internet of Things (IoT), focusing on the requirements of power transmission, substation, distribution and consumption. We analyze the 5G network slicing management based on blockchain technology, which can realize the dynamic selection of the best resources among multiple resources to create end-to-end network slices that meet business needs and security isolation requirements, and enhance the security of the network and the data in multiple scenarios and applications, it will provide a strong network infrastructure support for the Energy IoT service system.