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The structure of new generation avionics systems has changed, sharing degree of airborne systems resources become higher and higher. FC-AE-ASM(The Fiber Channel-Avionics Environment-Anonymous Subscriber Messaging) protocols as high-performance network communication protocols of new generation was introduced into the avionics system. This article starts from the FC-AE-ASM protocol, the principle of switch works, with Petri-nets as a tool to establish a network model ,message transmission model and switch works working principle model.Do simulation to system model which have built,can obtain results of network load and message delay performance trend indicators,through the analysis of the performance trend indicators, provide important theoretical basis for fiber channel network applications in avionics environment.