Aiming at the problem of fuse trajectory adaptability, taking the “Tomahawk” ground-attack cruise missile as an example, the finite element simulation and numerical calculation were used to study the fuse trajectory adaptability under the 2 extreme conditions of missile terminal trajectory accidental touchdown and falling into the water. The results show that under the condition of accidental touchdown, the overload felt by the fuse is larger, and the warhead can be detonated reliably; under the condition of accidental falling, the overload felt by the fuse is smaller, and the warhead can not be detonated; the research method can be used for reference by fuse design and production units.