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FlexRay is known as "the next generation of vehicle network" with the advantages of real-time, flexibility and high bandwidth. However, the complex protocol makes it difficult to build and debug the node network. Currently debugging tools can not be used to further analyze the network performance, which is the limitation in application, such as CANoe. In order to solve the problems above, a solution for multiple datas acquisition and storage at the same time is presented,and the FlexRay network monitoring platform is designed with FPGA as the core,where the protocol is based on the SPI and USB bus and tri-stage queue buffer is used for data cache.It realizes the monitoring function of the communication data, obtains the register state of the node CPU, records the arrival time of the frame, and then analyzes the network operation and fault state, and solves the problem of massive data buffer overflow. The result shows that the system can run stably and is suitable for designing FlexRay network quickly and optimally.