Abstract: Tourism spatial structure is referring to the tourism system function organization way on the space projection or appearance, which is spatial interactions and correlations of human beings in tourism activities due to the regional difference between a tourist destination, tourist places and tourist traffic line system. Its space structure's rationality affects the destination tourism development momentum directly. Though the Yellow River Three Gorges Scenic Area is located in the northwest arid region, relying on the rich and unique resources advantage has become one of the most famous scenic spot in the Yellow River basin. Influenced by the river valley basis, with typical spatial characteristics of its resource types, spatial structure, touring line etc. affects the tourism spatial pattern deeply. Paper with the ArcGIS spatial network plane analysis module and Excel platform analyze the tourist resources spatial structure of Yellow River Three Gorges Scenic Area quantitatively, with the neighboring index and variation coefficient of Voronoi polygon analyzing its spatial distribution type, with the geographic concentration index and Gini coefficient analyzing its spatial distribution of balance, with index β, index γ and index α analyzing its connection degree index. The results show that the spatial distribution of tourism resources in the scenic area uniformity is low,and it is polycentric aggregated distribution. This is not only conductive to the integration of scenic spots and tourism scale effect, also can reduce the external diseconomy interval shield effect. Between scenic spots the transport network density is low, space contact is weak and accessibility is low. Between the scenic spots lack of directly connect and circular tourist route, and it is back and forth of single line.

Key words: tourism resources, spatial structure, proportionality, accessibility, Yellow River Three Gorges Area, Gansu Province