Aiming at the characteristics of poor rigidity of milling cutter rod with large aspect ratio and easy to occur cutting chatter in machining, a new type dynamic shock absorber was proposed. The overall structure of the milling cutter rod was designed, and the milling dynamic model of the vibration absorbed milling system was established. The formula of optimal frequency ratio and optimal damping ratio was deduced by using fixedpoint theory of mechanical vibration and dynamic vibration absorber, and the MATLAB software was used to verify the accuracy of the established model. The optimal parameters of the vibration absorber were calculated and the structural design of the dynamic shock absorber was carried out. The simulation experiment was carried out by using ADAMS software to verify the vibration reduction effect of the designed vibration absorber, and the actual cutting experiment was carried out. The results show that the designed vibration absorber has good good vibration reduction effect.