Cascading failures in complex networks is of great significance for the stability assessment of complex networks. Based on the classical linear load and capacity model

a model resisting cascading failures is built by detecting the community structure of the networks and adding secondary tolerance value to community boundary nodes. In the process of cascading failures

different strategies are used to attack IEEE standard grids

domestic real grids. The simulation results show that the model can raise networks stability with lower cost by adding secondary tolerance value to community boundary nodes

finding that the community boundary nodes have the dual functions of "firewall" and "tipping point". By simulating the two-tier coupled networks except for single networks

the new model is also found abler to resist cascading failures in interdependent networks

which indicates that the proposed model has some flexibility.