Flow will cause significant vibrations in undersea payloads. Flow-induced vibration (FIV) has various adverse effects on the system. Computational fluid dynamics (CFD) method is adopted to solve the flow pass the system. Simplify the system into a two degree of freedom system. Suppress the vibration of the main cylinder through two symmetrical rotating control rods. The results show that control rods can suppress vibration by 24.8% at UR = 8. The rotating control rods can reduce the negative impact of the wake vortex generated by the main cylinder, thereby reducing the amplitude. By changing the angle of the control rods, the vibration suppression effect can be improved to 95.3%. The mode with the control rod angle of 50° not only optimizes the vibration suppression performance at low reduced velocity, but also has a wider range of vibration suppression and lower vibration peaks. By adjusting the position without changing the rotational speed of the control rods, the vibration suppression effect of the control rods can also be improved.