Abstract: An Automatic Ball Balancer （ABB） can entirely eliminate the unknown imbalance of the rotor above the critical speed. However， it has the disadvantage of causing large amplitude resonance response and unstable oscillation near the critical speed. To overcome these shortcomings and improve its vibration suppression performance， this paper proposes the addition of a Dynamic Vi? bration Absorber （DVA）. Using the Jeffcott eccentric rotor model as the research object， dynamic equations are established to con? trol the unbalanced vibration of the rotor when the DVA and ABB are used either separately or in combination， based on the La? grange equation. The harmonic balance method is used to solve the amplitude expression of the new coupling system， and the influ? ence laws of each parameter on the steady-state amplitude-frequency curve are analyzed to obtain more suitable parameters. The steady-state amplitude-frequency characteristic diagram and the transient amplitude time-domain change curves are obtained using the Runge-Kutta numerical calculation method. The comparison results show that the new scheme of combining the two methods effectively reduces the vibration level of the rotor when passing through the critical resonance region， and causes the rotor to attenu? ate to zero amplitude above the critical speed. This new scheme achieves the goal of combining the advantages of the two methods and provides superior vibration suppression.