In the working process of marine hydraulic system, the low noise vibration of the hydraulic manifold block will not only aggravate the radiation noise, but also shorten the service life of the related parts. In order to reduce the vibration of the hydraulic manifold block, a simplified model of the system is established. Then the control method of the magnetorheological dynamic vibration absorber is completed by integrating the advantages of the adaptive tuned vibration absorber and the active vibration absorber with the analysis of the dynamic characteristics of the model. The dynamic vibration absorber can track the excitation frequency and eliminate the influence of the initial state of the system, while the damping force can be counteracted by the active force introduced by the MR damper. The simulation results show that the vibration of the hydraulic manifold is obviously weakened, and the magnetorheological dynamic absorber performs better.