The article introduces the network topology of DCS system of cement plant based on the redundancy design scheme of dual ring network under Hirschmann HIPER-Ring protocol. In this scheme, the Freelance AC900F controller in the automatic integrated control system of the cement plant forms a redundant dual ring network topology with the optical fiber interconnected Hirschmann switch, which can automatically switch to the standby communication line in case of failure of the communication line, play the high reliability of the redundancy ring network, at the same time, avoid the broadcast storm, and effectively improve the reliability and stability of the automatic control system of the cement plant.