To solve the problems of data transmit speed, real-time and anti-jamming in ARINC429 bus data communication system, a new ARINC429 bus data communication system based on the DSP technique is designed. This paper discusses the structure and the operating principle of the system in details, and also introduces the software and hardware design. The application shows that this system is characterized with high speed of data transition, good character of real-time and strong ability of anti-jamming.