长三角泛化已是区域发展的总体趋势，但长三角泛化至何范围则是区域一体化研究的首要问题。对于“泛长三角”范围的界定，目前众多学者说法不一。客观上，区域间地域相连、人缘相亲、文化相融、经济相通、要素流动频繁、优势互补等是进行“泛长三角”区域范围界定的关键因素。因此区域范围界定应由区际间经济社会等多方面联系指标所决定。鉴于此，文章在分析“泛长三角”概念内涵及发展条件的基础上，对各省与长三角之间的各种联系指标做出了比较，同时对周边省份与长三角之间联系的发展趋势，以及部分省区与其它范围的核心区如珠三角区域、京津冀区域之间的联系作比较分析。在此基础上，通过引力模型，采用多指标综合评价法对长三角与周围省区的联系强度做初步的定量比较。针对综合分析结果，在区域经济一体化背景下及在长三角及周边省份经济社会发展现实基础上提出“泛长三角”适度发展范围，从而为“泛长三角”区域一体化进程提供一定参考。

Expansion of Yangtze River Delta has been a general trend of regional development, but the determination of its scope is a primary problem in the study of regional integration. Recently, scholars show their respective attitudes towards the problem of how to define the scope of “Pan-Yangtze River Delta”. Objectively, there are several key factors to define the scope of the “Pan-Yangtze River Delta”, such as interregional connection, intimate personal relationship, cultural accommodation, economic assimilation, frequent fluxion of essential factors and survival of the fittest, which are the key factors to define the region of the “Pan-Yangtze River Delta”. Therefore, some indicators including economic and social links between the regions can determine the scope of inter-regional connection. Based on the analysis of the concept and the development conditions of “Pan-Yangtze River Delta”, firstly, this paper compares the various related indicators between Yangtze River Delta and the provinces around it; secondly, the paper compares the development trends of the relationship between Yangtze River Delta and neighboring provinces, thirdly, this paper analyses the relation between some of the neighboring provinces and other regions such as the Pearl River Delta region and the Bohai Rim. On this basis, a synthesized evaluation system including multiple indexes is established. Combining the system with the gravity model, the paper gives a qualitative comparison of the linking degrees between the neighboring provinces and Yangtze River Delta region. Finally, according to the regional economic integration as well as the current social and economic development of the neighboring provinces in the Yangtze River Delta, we propose a moderate development scope of “Pan-Yangtze River Delta” based on the overall analysis in order to provide a valuable reference to the process of regional integration