In this paper, the penetration of a segmented rod with a spherical structure is studied at different velocities. The penetration depth and penetration efficiency of the ideal cylinder segmented rod and the ideal sphere segmented rod were calculated at three different speeds of low speed, medium speed and high speed. The results show that the penetration depth of sphere segmented rod is greater than that of cylindrical segmented rod, which can provide a reference for the engineering application of segmented rod.