Study on the cascading failure model of double-layer coupling network

Aiming at the problem of double-layer network cascading failure, the paper presents the parameters of the importance of the nodes in the double layer network, analyzes the condition of the double-layer network cascading failure. According to different network models, the weight distribution of node degree and clustering coefficient is carried out, and the corresponding coupling network model is established. The study shows that the effective evaluation of node importance can improve network robustness. At the same time, it shows that the same kind of double layer network can improve the robustness of the network. Research shows that the importance nodes can be protected.This network can effectively prevent cascade failure in real life.