The invention relates to the field of electromagnetic protection and aims at providing an electromagnetic pulse protection device, comprising a first level protection device, a radio frequency switch, a second level protection device, a protection device, a first single-pole double-throw switch and a second single-pole double-throw switch. The first level protection device comprises a waveguide plasma amplitude limiter and a broadband filter. The second level protection device comprises an amplitude limiter assembly. The protection device comprises a notch filter assembly. An antenna interface, the first level protection device, the second level protection device and the protection device are connected in sequence through a radio frequency cable. The first single-pole double-throw switch and the second single-pole double-throw switch are connected and then are connected with the notch filter assembly in parallel. The first single-pole double-throw switch is connected with the amplitude limiter assembly. The second single-pole double-throw switch is connected with a receiving front end. The device has the beneficial effects that high level signal interference between strong electromagnetic pulse and devices is suppressed at the same time, and under the condition that interference signal frequency points and a bandwidth are known, the function that a radio frequency system still can work is ensured.