Abstract: Rerouting technique is used wildly in anonymous communication.The paper at first arrives the conclusion that application overlay network is virtually an open queuing networks which is consisted of anonymous agents. Based on the analysis of rerouting technique,The paper builds up an anonymous agent overlay network model and analyzes its performance parameters by introducing Jackson open queuing networks model and its analysis methods. The result is useful not only for the person who researches and designs the anonymous communication system,but also for those who research anonymous communication tracking technique,because it gives them a new method and a theory basis concerned.