Taking anti-ship missile as type, two different kind of discrete rods of the anti-type dislocation double-beam discrete rod and the cis-double-beam discrete rod were proposed. The finite element model of dual-beam rotating discrete rods was established by the pre-processing software Truegrid; the fluid-solid coupling algorithm was adopted using the nonlinear finite element software LS-DYNA to simulate dispersal process of dual-beam rotating discrete rods, and the simulation results were comparatively ana-lyzed. The results show that the rods in two rod rings which the anti-type dislocation double-beam discrete rods form spin in the opposite direction, and the gap between two rows of poles can be mutually complementary, so the probability of damage on targets is improved.