GPS signal is the main way to control UAV. Generally speaking, there is a certain distance from control to UAV in signal propagation. At this time, the signal is relatively weak. Therefore, it is easier to use UAV jammer to counter UAV at this time, and it becomes easier to interfere with GPS signal. Most consumer UAVs will choose GPS signals for flight control, and these GPS signals are not encrypted. UAV jammer just seizes this loophole to take measures. At present, by sending strong interference signals and suppressing control signals, UAVs can land or return. With this principle. The equipment can be used after the UAV is started to send interference signals of all frequencies to the UAV, so that it can leave the operator's control and land automatically without receiving any control signals, so as to ensure the safety of the protection area.