Abstract:The industrial control system is the core control center of industrial production, and the production process is generally monitored in real time through PLC. The communication between the host computer server and the PLC is generally based on the industrial control protocol. The industrial control protocol is developed by each industrial control company. It has poor compatibility and strong closure. Its communication is often a difficult point in automation projects. As a new generation of mobile communication technology, 5G communication technology has excellent characteristics such as high bandwidth, low delay, and good stability. It is naturally suitable for industrial control networks with extremely high communication requirements. However, 5G networks are usually constructed by operators, and data needs to be interacted through the operator's core network. How to realize the intercommunication between 5G networks and industrial PLC has become a difficult issue. Based on the base layer of industrial control protocol and through MEC edge calculation and tunnel technology, this paper proposes a new method of industrial control network communication.