Abstract: To analyze controller area network (CAN) protocol and evaluate CAN network performance, the CAN network modeling method was developed, based on the OPNET network simulation environment. Layered modeling method was adopted to implement CAN node model. Medium access control (MAC) module, error module and deference module were proposed based on function in the MAC sublayer of node model in order to ensure clear system structure. Network response time analysis model and inaccessibility analysis model were implemented using process design separately in MAC module and in error module. Link model and data model were defined and edited. CAN network was configured and simulated according to example model. The agreement of the simulation results with the example model testing results prove this model is valid. Through results analysis of specifically-configured network, CAN network performances were discussed. Independent and editable node model, link model and data model were provided, indicating these models could be used to carry out varied network configuration flexibly and analyze varied network topologies.