Abstract: A description is made in the paper of the structural make-up of the network of the plant's overall control system, and the working principle and special advantage of the DLR control system. Practice shows that the use of the Ethernet ring networking mode can lead to reduction of the number of external components and related cables required, rapid location of point of failure, shortening of system maintenance time, and make it possible to lay a technical foundation for the incorporation of large-data in the future.