中文摘要：

借助社会网络理论与方法，以跨界旅游区内主要旅游企业的人才就业、餐饮原料与用品、住宿用品、旅游商品等的供给为经济要素指标，以壶口瀑布风景名胜区为案例地，通过问卷调查，确定各经济要素的供给地，以此为社会网络节点，构建跨界旅游区经济联系发生矩阵、邻接矩阵及其网络结构图，探寻各跨界网络特征、成因分析及其模型构建，结果表明：（1）跨界旅游区的两侧景区与地方经济联系较弱，边界效应极强；（2）两侧景区均以餐饮网联系度最高，就业网最低，分网络之间呈金字塔结构模式；（3）在邻接网中，西安、吉县、乡宁三点中心度最高，成为景区突破边界效应，带动跨界旅游区域一体化的关键节点；（4）跨界旅游区空间结构与规模呈现显著的行政对称格局，在网络演化过程中，节点选择、节点数量、经济联系度等遵循距离衰减规律，形成反扇形对称扩散形态。

英文摘要：

Based on social network theory, with the basic measurement indicators of the supply of employment, catering supplies, accommodation supplies and tourism commodity of main economic entity in tourism region, this study not only finds different supply places and determines network nodes through field investigation, and also constructs incidence matrix, adjacency matrix and network structure of economic ties between the cross border tourism region Hukou Waterfall scenic area and the periphery. Besides, the cross-border networks are tested, the forming causes are analysed, and their models are constructed in this paper based on the establishment of evaluation index system. Finally, four conclu sions are drawn as follows. （1） The economic ties between both sides of tourism region and the periphery are weak, showing a very strong border effect. （2） The tie of catering network is the strongest, yet the tie of accommodation network is the weakest on both sides. All the networks constitute a pyramid structure model. （3） The centrality of Xi＇an, Jixian and Xiangning are the highest among all the adjacent matrixes, which is the key point of breaking through border effect, and of promoting cross border regional integration for the initial growth of tourism region. （4） The structure and scale of regional distribu- tion on both sides show a significant administrative symmetry pattern. The choice and number of nodes, and economic ties also follow distance attenuation laws in the network development process, based on which anti-fan symmetrical diffusion forms are construc ted.