Abstract: In order to evaluate the reliability of airport collection and distribution,the differences of node impor-tance and road classes are analyzed,which shows that the connections of the network of airport designated roads and serv-ice roads differs from their urban counterpart.Therefore,edge weights are given based on feature index algorithm of the traditional complex network,and an improved complex network model is proposed.The model is verified by through sim-ulation tests,combining with a case study for the road network of Beijing Capital Airport.The results show that the de-gree distribution of traditional complex network model obeys the Poisson distribution,while the improved complex net-work model follows the power-law distribution,which fits the scale-free property of airport road network better.Moreo-ver,the cluster coefficient of the improved complex network model is 0.01 5,only 20% of the traditional complex network model,and the average weighted length is 10.38,which is 1.1 5 longer than the average path length.It fits the functional classification of airport roads,but the scale-free property is not significant.It is also found through the attacking simula-tions that node strength is more important for network reliability than the node degree,and the reliability of airport road network can be effectively improved by enhancing the protection of this type of nodes.