The parallel redundancy protocol (PRP) issued by IEC62439-3 is introduced to solve the problem that the communication reliability of real-time measurement and control private network is low when dealing with single point of failure. The feasibility of the protocol in the real-time measurement and control network is analyzed, and the PRP is combined with the BICS (bus for instrument control system) bus communication protocol in the data link layer by using Verilog programming language to realize the dual redundant reliable and low-latency data transmission of the BICS bus. Achieve the effect of seamless network switching and 0 recovery time in case of a single point of failure. The results show that the protocol provides a reference way and implementation idea for improving the communication reliability of the measurement and control system network.