Abstract:In order to ensure the safe operation of the urban rail transit transportation network, the optimization strategy of the transformation, expansion and construction of the urban rail transit network is more targeted and the network's anti-destruction ability is improved. Through complex network theory to build road network model of urban rail transit network, this model introduced a concept of virtual change to the side, easy to accurately describe the edge weights of network, and put forward the improved edge weight function and traffic flow dynamic allocation principle, network cascading failure model is established. The empirical analysis of zhengzhou urban rail transit network shows that the improved cascade failure model can simulate the cascade failure process more accurately. The robustness of selective attack networks is poor under selective attack and random attack. It can be seen that when optimizing urban rail transit network, attention should be paid to improving the robustness of key nodes and realizing efficient operation of the network.