Based on related standards of CAN bus, the airborne bus standard ARINC825 makes adaptive improvements on CAN protocol from the aspects of communication scheduling, integrity protocol and redundancy, which meets the requirement of civil aircrafts on high safety.To ensure determinism, major and minor time slices based communication scheduling are introduced to the high layer protocol.The determinism of ARINC825 is analyzed, a design method based on FPGA is put forward, and the design is then verified through network simulation and tests, which demonstrate that the design and the end-to-end latency meet the requirements of determinism.