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With the rapid development of civil aviation in our country, especially the general aviation field, and a low opening policy implementation, the number increased rapidly, airspace become more busy and crowded, and at the same time increase the aircraft flight in a low-level close to the possibility of danger. At the same time, with the increase of number of an unmanned aerial vehicle (uav), brought a certain security hidden danger to the civil aviation system. Aircraft collision avoidance warning system based on Beidou a low-level range for aircraft in a low-level near its airspace in traffic, by 4G mobile communication receive real-time processing of flight data information and real-time monitoring of aircraft, when there is a potential safety hazard when the aircraft make corresponding levels of warning and warned the corresponding vehicle information in advance, to help craft choice.