Abstract: The development of spatial network is one of the characteristics of tourism development in the Urban agglomeration of the Silk Road. Taking 2009, 2014 and 2019 as time sections, this thesis used the modified gravity model and social network analysis to analyze the evolution of spatial network structure of tourism economic links of 27 cities in the Silk Road urban agglomeration. The research results are as follows. First, the strength of tourism economic links in the Silk Road urban agglomeration has been greatly increased, but there is a serious imbalance. Second, the tourism network structure of urban agglomeration tends to mature, and there are differences in the centrality of network nodes. Third, the core area of the network is expanding from east to west. Finally, there are very similar subgroups in urban agglomeration, which are in dynamic change. Based on these results, the thesis combines the current situation of resources and traffic in each city and constructs a development model of “three-level, three-axis, and four-area” from three angles of point, line and area, so as to realize the coordinated development of the Silk Road urban agglomeration.