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Airborne real-time data processing can greatly improve the efficiency of data processing. In order to meet the needs of real-time data processing under the airborne networked test system architecture, a real-time network data processing software based on VxWorks was designed and implemented. The software runs on a multi-core embedded data processing system and ensures real-time performance through the multi-task concurrent execution method. During the software running process, the zero-copy technology is used to receive the network packet data sent by the test system in real time, and then the original data is stored in a custom file format. At the same time, the network packets that need to be processed are stored in the data processing buffer. Parse the network packet data, and finally use the reserved cache method to write the processing result to the result file. Practice has proved that the software can quickly receive and process network data in real time, while storing raw data and result data. This method effectively improves the efficiency of data processing and provides a new way for flight test data processing.