The complexity of the avionics environment makes the traditional data bus unable to meet the transmission requirements of real-time messages. With the excellent performance of the FC protocol, an FC protocol chip is designed based on the FPGA platform, and a logic design is implemented in detail on the main modules.The results from simulations and development board tests in the Windows7+ Modelsim10.1c environment show that the chip can meet the transmission requirements of real-time messages, implement protocol functions, and meet the application requirements of the avionics system.