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n the rapid development of military technology today, high-speed self piercing warheads have enormous strategic value in destroying deep buried high-value hard targets and multi-layer buildings. This article establishes dynamic response and magnetic field analysis models to deeply study the mechanical and magnetic field response characteristics of the fuze when self piercing warheads penetrate 6mC40 concrete targets and multi-layer reinforced concrete targets, providing support for improving the damage accuracy of self piercing warheads. In the study of the dynamic response of fuses, during the process of the warhead penetrating a concrete target, the eroded target presents a funnel shape. As the warhead penetrates deeper, the sparse effect of stress waves gradually weakens, and the velocity of the warhead linearly decays. In the final process of entering a stable penetration mode, the velocity decreases by about 52%. Due to the transmission and superposition of stress waves within the warhead, the overload signal detected by the fuse position is more oscillating. In the study of fuse magnetic field analysis, when the geomagnetic inclination angle is 90 ° and the geomagnetic declination angle is 0 ° (i.e. the geomagnetic field is perpendicular to the centerline of the target plate), the amplitude of the X and Y axis magnetic flux density is small, the signal is irregular, and the interlayer characteristics are not obvious; The Z-axis magnetic flux density has a large amplitude, regular signal, and obvious interlayer characteristics. The stronger the geomagnetic field, the larger the radius of the steel bar, the greater the geomagnetic inclination angle, and the more obvious the signal characteristics of penetrating the target layer. The Z-axis magnetic flux density is not affected by the geomagnetic declination angle.