Abstract: In view of problems of high cost and difficult operation in practice because fault arc's research need build special experimental environment to simulate series fault arc, parallel fault arc and grounding fault arc, the paper proposed a design scheme of Mayr arc model which can work in Matlab7 software. It introduced physical meaning of Mayr arc model equation, makes simulation of series fault arc happened in low-voltage AC line by use of Mayr arc model packaging subsystem, and simulates experiment of series fault arc happened in low-voltage AC line according to simulation circuit. The results of simulation and experiment showed that fault arc current of Mayr arc model is similar to fault arc current collected by the experiment, so it has certain feasibility to use Mayr arc model in simulation of fault arc of low-voltage AC line.