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目前我国各区域机场群内各机场功能定位趋同化严重，严重的同向定位导致各机场之间恶性竞争。尤其是地理位置相距较近的机场，旅客有多种选择。各个机场开辟相似的航线结构，都趋于构建大中型航空枢纽。以珠三角机场群为例，从旅客运力的角度构建趋同模型，提出趋同系数评价方法，对各机场进行区分定位。实行梯度定位，使该机场群内各机场之间协同发展，避免不必要的航线网络竞争，同时能够减轻空中交通管理的巨大压力，进一步促进航空运输的良性发展。“,”At present,the same airport function orientation of the airport group in our country is more seri-ous,which makes vicious competition between each airport. Especially the airport close to each other geo-graphically,it makes have many choices to the passengers. Every airport has similar route structure,and all of it are building large -sized aviation hub. Based on the Airport Group around Pearl River Delta ( PRD) Area,building model from the variable of the passenger capacity and putting forward the evalua-tion method of convergence factor,the article is positioning each airport. This method make the airports within the group developed coordinative,which avoid unnecessary competition between networks. At the same time,it can mitigate the pressure of air traffic management and promote the benign development of air transport.