Abstract: The performance evaluation for concurrent software is one of the important means to improve the quality of development. This paper mainly discusses applying the combination of object-orientation and Petri nets to the system modeling of concurrent software development, and the simulation technique for concurrent software based on OPN(Object Petri Nets). It also discusses the key techniques and solutions when implementing a dynamic simulation tool based on OPN.The initial experiment results show that this implementation mechanism and processing methods discussed here are effective and feasible.