GPS navigation signal is an important technical guarantee for aircraft flight safety. Not long ago, the crew of a civilian aircraft that landed at Liuzhou Airport reported that GPS signals received radio interference when they were about 5 miles from the runway when they were about to land and were about to land. The jamming signal disappeared until about 4 kilometers away from the runway. The length of downtime for various commercial aircraft varies. The shortest time for passenger aircraft GPS to be interfered is 60 seconds, and the longest time is 125 seconds. After receiving the complaint, Liuzhou Radio Monitoring Center sent reconnaissance personnel and mobile reconnaissance vehicles to the area under the GPS jammer route to conduct carpet radio monitoring and interference research. It was finally determined that the source of interference was the GPS installed in the used car warehouse. Signal jammer. After questioning, the owner of the car warehouse admitted that the jammer was purchased from the Internet in order to protect the GPS signals of the cars in the warehouse and prevent the discovery of vehicle location information. After that, the public security police confiscated GPS signals protecting the cars in the warehouse and prevented the discovery of vehicle location information. After that, the public security police confiscated GPS signals protecting the cars in the warehouse and prevented the discovery of vehicle location information. After that, the public security police confiscated the GPS signal, which was interfered in accordance with the law, and brought the warehouse owner back to the Public Security Bureau for further investigation.