This paper focuses on investigating the effects of the effects of cab isolation system damping coefficients on vibratory roller ride comfort based on a half-vehicle dynamic model of a double-drum vibratory roller based on the study results when both front and rear drums compact on the original place. The comparison results of power spectral density (PSD) acceleration responses of the vertical driver’s seat (as) and cab’s pitch angle (acphi) are selected as the objective functions to investigate its effects on vehicle ride comfort. The results indicate that the peak amplitude values of PSD acphi and as with cc=0.5 cc0 respectively increase in comparison with cc=1.0 cc0. Especially, the peak amplitude values of PSD as with cc=0.5 cc0 respectively increase by 17.05 % and 17.42% at the frequency values of 2.633 Hz and 4.33 Hz. As cc reduces, the vehicle’s ride comfort deteriorates and the peak amplitude values of PSD acphi and as with cc=1.5 cc0 respectively reduce in comparison with cc=1.0 cc0. Especially, the peak amplitude values of PSD as with cc=1.5 cc0 respectively reduce by 21.34 % and 20.15% at the frequency values of 2.633 Hz and 4.33 Hz. As cc increases, the vehicle’s ride comfort improves significantly.