Abstract: The proposal of “Belt and Road Initiative” and the successful application of “Silk Road: Chang'an-Tianshan Corridor Road Network” provide a broader development space for urban tourism along the Silk Road.The study of “Silk Road” from the perspective of tourists can better reflect the movement law and development trend of the actual tourist flow, and the digital footprint enriches the study of the spatial network of tourist flow. By means of digital footprint, social network analysis, GIS and other methods, this paper selects online travel notes and photos from 2014 to 2019, takes 33 cities as nodes, and discusses the spatial structure characteristics of Silk Road tourism flow from different spatial scales of points (single city nodes), lines (tourist routes) and planes (overall network structure). The results show that:the role of nodes in each city is quite different, some cities have not fully played their corresponding functions, and Lanzhou, Dunhuang and Xi'an have obvious advantages in spatial nodes; tourism routes are mainly based on regional tour and single destination mode, and the length of the route is negatively correlated with the frequency of tourism flow; the network structure is unbalanced and blocky, Shaanxi, Gansu, Ningxia, Qinghai and Xinjiang provinces (autonomous regions) have large connectivity, but the overall network density is low. Finally, the paper puts forward suggestions on promoting the optimization and upgrading of the tourism structure of the Silk Road from point to line to aspects.