Location Selection of Fujian Emergency Material Reserve Center Based on Complex Network

China has a vast territory, facing a large population and vast territory, it is inevitable to have large-scale emergency events such as natural disasters such as Wenchuan earthquake and new crown epidemic situation. Therefore, it is necessary to establish a reasonable and perfect emergency logistics system. This paper takes Fujian Province as an example, based on the idea of complex network, taking the cities at prefecture level and county level as nodes, taking the expressway network and high-speed railway network in Fujian Province as the edge to construct the undirected logistics network. By analyzing the degree, medium number, aggregation coefficient and other parameters of each node in the network, it analyzes the accessibility and irreplaceable of each node in the whole logistics network, so as to select the appropriate node It is the reserve center of Fujian emergency logistics network.