In order to better understand the development level and the degree of development of the transportation network in different areas of the Hexi Corridor, the accessibility of the transportation network in the Hexi Corridor is studied. Firstly, calculate the road density of each county and district in the Hexi Corridor. Then, in view of the topographic characteristics of the Hexi Corridor, introduce the shortest travel time and travel cost into the gravity model, consider the accessibility of both road and railway transportation modes between nodes, construct a comprehensive accessibility model, and analyze the spatial characteristics of the comprehensive accessibility of each county and district in the Hexi Corridor. Secondly, the gravitational model is used to analyze the economic connection intensity among the counties and districts in the Hexi Corridor.
Finally, calculate the Gini coefficient, draw the Lorenz curve, and analyze the fairness of the comprehensive accessibility of the Hexi Corridor. Research shows that the comprehensive accessibility and economic connection centrality of each county and district in the Hexi Corridor present a spatial structure of “one belt and one core”, and both the comprehensive accessibility and economic connection centrality show a attenuation from the core area to the strip-shaped area. Liangzhou District of Wuwei City is the main core area of the Hexi Corridor. The Gini coefficient of comprehensive accessibility based on the cumulative proportion of population and GDP is all within the unfair range, and the overall development of the Hexi Corridor and the distribution of the transportation network are unfair. The research results can provide decision support for the optimization of the transportation network, economic development and tourism development in the Hexi Corridor.