This paper conducted a modal analysis and a harmonic response analysis on the blanket cylinder in consideration of the bearing stiffness. A finite element model of blanket cylinder was built by applying the finite element analysis software Ansys. The first five-order modal shape and the inherent frequency were obtained by the analyses and the influence of bearing stiffness on the inherent frequency was further analyzed. The frequency response curve of the amplitude under load impact was worked out through the harmonic response analysis. These analytical results above showed that the dynamic characteristics of blanket cylinder were fine and the printing quality can be assured.