Abstract: In order to improve the protection of electronic equipments in aircraft cabin against the indirect effects of lightning, and based on SAE-ARP5412 and other related standards, the paper establishes a simulating calculation model at the time of lightning and designs simulation parameters on studying the electromagnetic environment of electronic equipments in aircraft cabin.comparison of the galvanic coupling field in different cabins ismade by simulation when lightning and the transient coupling current of the electronic equipment cable is achieved.The simulation shows that, the galvanic coupling field inside the aircraft cockpit is most powerful compard with other cabins in the same discharging channel; both electric field and magnetic field increases when the gap structure at the cabin door is defined; coaxial cable has a better shielding efficiency, which helps to avoid the generation of a greater transient induced current on the core wire.The result of the study has a certain guiding significance for the lightning protection of electronic equipments in the aircraft cabin.