The work aims to predict the penetration / perforation performance of tungsten fiber reinforced metallic glass composite long rods, and provide guidance for optimizing the impact velocity and the rod nose shape. Finite element simulations on the penetration of composite long rods into steel targets at different impact velocities were conducted in combination with the related penetration tests, in which mesoscopic geometric models were established and a modified thermal-mechanical coupling constitutive model was used to describe the mechanical properties of metallic glass matrix, and then the differences in failure modes of composite long rod at different velocities were analyzed. The effect of impact velocity on the nose shape of composite long rods and its internal mechanism were discussed. Related analysis demonstrated that at relatively lower impact velocity, the tungsten fibers within the rod nose underwent severe buckling and bending deformation, and the buckled fibers accumulated on the rod nose and formed a thick edge layer , in which there were 1~2 shear bands, and the rod nose exhibited an "ogive" shape; Along with the increase of impact velocity, the bulking of tungsten fibers in the rod nose became less severe, and the thickness of "edge layer also became thinner gradually. Besides, the tungsten fiber outside also began to flow backward, and thus the sharpness of the "ogive" rod nose decreased gradually; When at a high impact velocity, the tungsten fibers in the rod nose no longer bulked severely, and the edge layer thinner. At the same time, the tungsten fibers outside also flowed backward. Eventually, the rod nose displayed a shape. On the whole, the impact velocity has significant influence on the deformation and failure characteristics of composite rod nose, and along with the increase of impact velocity, the nose shape gradually changes from the shape to the , and eventually to the ” shape.