The low-altitude defense system mainly realizes the detection, tracking and control of intrusion low-slow and small UAVs. Discover, identify and locate UAVs through radio detection equipment and low-altitude defense radar. Precise tracking of drones and video forensics through optoelectronic devices. By suppressing the interference equipment and navigation deception equipment, interrupting the remote control signal, digital image transmission signal, and navigation and positioning signal between the invading UAV and the remote control, realizing the drive away or forced landing of the invading UAV, protecting the key and vital units low-altitude security. The system has self-developed accusation platform software, supports domestic computers, system software and application software, and is widely used in public security, judicial, military, electric power, petrochemical, airports, industrial parks, residences of dignitaries and other industries and scenarioses.