The Airport Perimeter Security System uses radar to continuously scan the monitoring area, and accurately detects the distance, angle, speed and other information of the intrusion target, integrates the secondary review of the video, and actively tracks and warns the real target. At the same time, using the classification technology based on machine learning, it can realize intelligent differentiation of intrusion target types such as people, vehicles, and trees. The system has the capabilities of multi-sensor fusion, moving target tracking, identification and monitoring, coordinate azimuth map determination, and active early warning under all-weather conditions.