Aiming at the problem that the onboard radar of radar vehicle will cause radiation to the fighters in the cockpit when it is performing its mission, this paper studies the strong electromagnetic protection technology of the cockpit of radar vehicle, determines the protection index through technical index demonstration, determines the key protection position through electromagnetic coupling path analysis, verifies the correctness of the determined key protection position through simulation design, and forms the electromagnetic protection design scheme for weak electromagnetic coupling links. Finally, the effectiveness of the electromagnetic protection scheme for the cockpit of a radar vehicle is verified based on the electric field strength and shielding effectiveness indexes in the cockpit after protection.