In order to make the layout of the general airport consistent with the rapid development of China"s general airport, this paper proposed the layout planning method of A2 general airport according to the type of general airport in China, and analyzed the functional requirements and positioning of A2 general airport. The social public service attributes and economic attributes of the A2 general airport were introduced, and the detailed analysis was carried out. The two major attributes were characterized by the risk level of accident occurrence, population density and economic scale, and weighted them. Combined with the mathematical model of P-median location, the rescue range of A2 general airport was modeled and analyzed. The relationship between the number of pre-selected sites and the weighted distance was analyzed. The rationality of the model and algorithm was verified by an example, which makes the layout planning of the A2 general airport more reliable and practical.