Abstract: The current research on SCADA system mostly focuses on engineering application, software architecture design, data transmission and processing of communication protocol, while the application and research on SCADA system network for large oil and gas pipelines are less involved. The existing SCADA system network research achievements fail to meet the high-quality and high-reliability redundancy requirements for data network transmission of production and scheduling service. Therefore, the high-reliability redundant network architecture suitable for large SCADA system was designed, with the design idea of the layered architecture design, the redundancy of equipment in each layer and the redundancy of links between equipment. Protocols including PVST + spanning tree, HSRP, EIGRP, BGP, route-mapping were combined and used in each layer of network according to their algorithm characteristics, thereby ensuring continuous and uninterrupted data network transmission of oil and gas pipeline production services, enabling the automatic selection of the best path for transmission of production data between the station and the control center according to links, and meeting the operational requirements of the oil and gas pipeline control and operation on network transmission of production data.