本文利用泛长三角城市职能指标指数将各城市划分为3个等级中心城市，发现城市等级分布不均匀，高等级中心城市主要分布在中东部地区，为泛长三角的核心地区，并且随着经济发展，中心等级差异在不断减弱。通过修正的引力模型计算城市之间的经济关联量，发现经济关联量区域差异十分明显，浙北与苏南城市经济关联量明显，安徽、苏北、浙南地区经济关联量较弱，利用社会网络分析法分析各个城市在区域经济中的中心地位，通过点入度与点出度分析经济扩散效应，利用Concor法将泛长三角划分为8个凝聚子群，分析各个子群发展因素，为长三角区域经济发展提出建议。%〔Abstract〕 According to the urban function indexes of Pan Yangtze river cities , those cities could be divided into three kinds of cen-ter city . We can find that uneven distribution of city level , high-grade cities are mainly distributed in central and eastern regions as the core of Pan Yangtze river delta . As long with economic development , the difference of central level is weakening . By modifying gravity model , it calculates economic relationship between two cities , find that the economic quantity of associated regional differs obviously . The economic associations of the north of ZheJiang and south of Jiangsu province are stronger;associations of Anhui , north of Jiangsu and north of Zhejiang are week . By using social network analysis , it analyzes the center position of each cities in regional economy , analyzes the e-conomic diffusion effect through input and output degree points , then , using concor method to divided Pan Yangtze river delta into eight condensing subgroups . Through analyzing each subgroup development factors , it puts forward suggestions for regional economic develop-ment of Pan Yangtze river delta .
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