To improve the usability and running efficiency of the parallel network simulation

an approach for topology partitioning based on load estimation was realized: first

the relative load values of nodes and links

estimated according to their core levels in the topology map

were treated as their weights;then

the simulation task was partitioned by the graph partitioning tool.Experiments showed that this partitioning method could improve the performance of simulation by 16.4% compared to the partitioning method with no weights.Simulation of worms based on the real topology gathered via network measurement proves that the partitioning method is suitable for real large-scale network topology and can be used to simulate large-scale network security incidents.