The rapid development of regional integration has accelerated the differentiation of regional logistics development. In order to explore the differences and formation rules of regional logistics development levels, This study builds a three-layer complex network model of road freight, railway freight and logistics enterprises based on complex network theory. Then, taking the Guanzhong urban agglomeration as the research object, the gravity model is used to measure the gravitational weight between cities. After using MATLAB and UCINET software platform to calculate the complex network structure indicators of urban agglomeration logistics. Finally, the weighted centrality index is used to comprehensively evaluate the city's logistics development level and explore the strong logistics links between cities and the importance of logistics cities in multi-layer networks. It is found that the three-layer logistics network has the characteristics of small world and scale-free. Besides, there is a radial structure with Xi 'an as the core among the cities.Moreover, the distribution of cities is obviously hierarchical and the connection strength is heterogeneous. Keywords: complex network, multilayer network, logistics network, Centrality index, development evaluation

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