For the cascading failure problem of supply chain network, based on the complex network load-capacity model for cascading failure, a capacity allocation strategy with global and local information fully integrated for failure nodes is proposed and a supply chain cascading failure model is presented. Simulation experiments analyzes the influence of various factors on the supply chain network, such as attacking methods of the initial nodes, various capacity allocation strategy for different nodes and overload capacity, the results show the scientific and effectiveness of such the model.