Abstract: As the increase of chip density, design complexity problem and clock synchronization problem are more and more serious.Therefore, network-on-chip will become a popular way for on-chip interconnects.In this paper, we build up an NoC simulator, in which the inner module of the router could be detailed configured.The NoC model uses wormhole switch strategy and is built by SystemC transaction level language that has faster simulating speed.In addition, we proposes a more accurate simulating method.The result of the simulation shows that the model can be used in the simulation of NoC for multi-core structure.