ARINC429bus is widely used in civil aircraft. In the fight test, the real-time monitoring of message repetition ARINC429 event information occupies a large amount of telemetry bandwidth resources. Through embedded the data processing module into the airborne test system, the data processing module obtained the collected date of ARINC429 acquisition module through the backplane bus of the collector. The data processing module analyzed the aircraft incident information and delivered the results to the ground monitoring center by the telemetry system. It can greatly reduce the demand of telemetry bandwidth and make great significance for real-time safety monitoring of flight test.