中文摘要：

长江中游城市群是推动和引领长江中游地区乃至中部经济崛起的重要增长极。应用社会网络方法,对1990、2000、2012年长江中游城市群空间网络结构动态演变进行比较分析,研究发现：（1）1990年,武汉市与长沙市是长江中游的中心城市,长江中游城市群空间网络形态尚不完备,多数城市游离于网络之外,呈现一种稀疏网络空间结构,分别以武汉市和长沙市为中心形成两个星形城市小群体,构成的线型空间结构;（2）2000年,长江中游城市群网络结构日趋完整,武汉城市圈与长株潭城市群联系密切,环鄱阳湖城市群在南昌市的带领下积极融入其中;（3）2012年,南昌市由节点城市升级为中心城市,城市群网络异质性降低,网络扩散更为均匀,空间联系效率整体提高。城市群内城市间联系更加紧密、直接和成熟;（4）加强城市之间的直接交流联系,以共享目标引导城市群网络构建,走跨省区城市集群联合发展道路,发展多中心网络结构是实现长江中游地区崛起的关键。

英文摘要：

The urban agglomerations are important growth pole to lead and promote economy development in the middle Yangtze River Basin as well as Central China. By using social network analysis, we conducted a comparative analysis on spatial network structure＇s dynamic evolution of urban agglomerations in the middle Yangtze River Basin in 1990, 2000 and 2012. The findings of the study are shown as follows：（1） in 1990, Wuhan and Changsha were the two central cities in the middle Yangtze River Basin. The urban agglomerations＇ network structure has not yet been fully completed, which was a sparse network structure with the most cities falling outside the network. Taken Wuhan and Changsha as the centers respectively, it formed a linear relation structure constructed of the two small star-shaped cities groups.（2） In 2000, urban agglomerations＇ network structure became more complete. Wuhan metropolitan area and Changsha-Zhuzhou-Xiangtan urban agglomeration linked relatively close, and led by Nanchang, Poyang Lake urban agglomeration was merged in them actively.（3） In 2012, Nanchang became the central city. The spatial network structure of urban agglomerations in the middle Yangtze River has been changed obvious with Wuhan, Changsha, Nanchang as three urban centers. The network＇s heterogeneity of urban agglomerations reduced. The network was well-distributed and contact efficiency improved overall.The connection between cities became much tighter, more direct and mature.（4） The key factor to achieve regional development in the middle Yangtze River Basin is developing polycentric network structure and taking the combination development of urban agglomerations between inter-provincial, which should strengthen the direct communication between the urban agglomerations and construct urban agglomerations network by sharing the aim.