In recent years, with the wide application of a large number of frequency devices, the electromagnetic environment in space has become increasingly complex. The complex electromagnetic environment not only affects the performance of vehicle, but also threatens the viability of vehicle. The impact of electromagnetic environment on the vehicle cannot be underestimated, especially for the high-intensity electromagnetic pulse. The destructive ability of high-intensity electromagnetic pulse far exceeds the general electronic interference, which will cause the failure or damage of the vehicle's electronic and electrical components, seriously affecting the effective operation of the vehicle's maneuverability and safety performance. This paper systematically introduces the high-intensity electromagnetic environment that a vehicle may encounter, protection route of vehicle, analysis of electromagnetic environment effect and specific electromagnetic hardening measures adopted for the vehicle, for the purpose of improving the adaptability of vehicle to high-intensity electromagnetic environment.