Traditional ARINC429 bus system has the drawbacks of large volume, poor flexibility, and low integration level, which can not meet the requirements of aviation testing and diagnostics with the development of avionic system.An ARINC429 bus system based on Android smartphones is proposed, in which Android is used as a platform for mobile client to develop application program, S3C2440 is used as hardware control module, and HI-8583 chip is used for sending and receiving ARINC429 data.With wireless network as the transmission medium, the data information interaction between mobile terminal and hardware control terminal, and the drive control of S3C2440 to HI-8583, are implemented.Multiple users are allowed to access and exit system at the same time.Through the combination of TcpDump and Wireshare, the correctness of the network communication is verified.Finally, the reliability of the system is proved through overall system verification.