The continuous integration of the Internet of Things technology and distribution network has put forward new challenges for the existing power distribution automation master.In order to solve the large-scale access challenge of new types of networked equipment such as intelligent converged terminals,through research on key technologies such as plug and play,streaming computing,and time series data storage,IoT access services are built in the master station to achieve automatic access and Management,processing and storage of massively collected data.IoT access services have conducted preliminary applications in Beijing,Jiangsu.The results show that the developed components can greatly reduce the equipment access cycle,and promote the pace of construction of distribution materials.