According to the communication requirements of integrated avionics system onboard the new generation fighter, a data processing module system architecture based on RapidIO network was studied. A communication protocol software adaptive for avionics application mode and based on ARINC653 partition operating system was designed and implemented, which has found practical application in engineering. Function and performance verification showed that it can meet the large-data-volume and high-performance communication requirements in avionic system applications. The communication protocol software is implemented by hierarchical architecture, which is feasible for cross-platform migration, software reusing, and the subsequent hardware upgrading.