To meet the requirements for testing key capabilities such as multi-target warning and jamming reaction time of support equipment for airborne self-defense electronic countermeasure systems, this study designs a software-defined radar platform as the test equipment. Based on software-defined radio technology, this platform constructs a ground-based technical platform to simulate a dynamic radar target environment, receive, process, and analyze jamming signals, thereby achieving full-dimensional testing of the performance, functionality, and operational effectiveness of airborne electronic countermeasure systems. The system uses FPGA to process pulse descriptor word calculations, simulates complex electromagnetic environments, and verifies the equipment"s capabilities in real combat scenarios. By breaking through the limitations of traditional equipment and adopting a unified time reference, it effectively measures the overall performance of the equipment, providing a new means for in-situ testing of airborne self-defense electronic countermeasure equipment.