Abstract: In order to solve the problem of electromagnetic interference faced by vehicle-mounted antennas in complex electromagnetic environments, a modeling and analysis method for vehicle-mounted multi-antenna strong electromagnetic pulse electromagnetic coupling is proposed, the coupling mechanism of strong electromagnetic pulses is analyzed, an unmanned vehicle-mounted multi-antenna coupling model is established, and the law of antenna port coupling current under different angles of interference is obtained. Taking the vehicle-mounted Beidou antenna, VHF antenna and UHF antenna as the analysis objects, the relationship between the multi-antenna layout and the antenna port coupling effect under strong electromagnetic pulse irradiation is compared and analyzed. The results show that: (1) when the direction of the interfering electric field is parallel to the length of the antenna, the coupling current of the antenna port is larger, (2) the coupling current generated at the antenna port is the most serious at the resonance point of the antenna, and (3) the coupling between the antennas is significantly larger when the working frequency bands are similar, and the size is smaller than that of the whip antenna, and the electromagnetic coupling effect generated by the Beidou antenna is small. The modeling and analysis method proposed in this paper provides support for the coupling analysis, modeling and simulation, and improvement and optimization of strong electromagnetic pulse antennas of unmanned combat equipment.