Abstract:Network travel notes are an effective data source for studying the laws and characteristics of tourism flow. Social network analysis can visualize the structure of tourism flow network. Studying the structure characteristics of tourism flow network in Chongqing is helpful to the sustainable and coordinated development of tourism industry. By taking Ctrip's travel notes of Chongqing as the data source and by using Social Network Analysis, Arcgis105 and Ucinet6198 software, the network map of Chongqing's tourism flow was drawn, and the methods of Density, CorePeriphery, Cohesive Subgroups and Centrality were used to analyze the structural characteristics deeply. The results show that the distribution of tourism flow network of Chongqing is extremely unbalanced, and the coreperiphery structure feature between the main urban area and the surrounding counties is obvious. The density of tourism flow network is low as a whole, and the connection of tourism routes between the main urban area and the surrounding counties is relatively weak. The Yuzhong District is the centralized distribution area of core nodes, and the trickledown effect on the edge nodes of hinterland is significant. The tour routes of Chongqing tourists were radiated from the Yuzhong District to western Chongqing, southeast Chongqing and northeast Chongqing. The nodes of Hong Yadong and Jiefangbei and so on increased and strengthened the role of hub as a result of Wanghong effect.