Geometric model and finite element model of CTP imaging drum are established using finite element analysis software ANSYS. The relationship between plate and roller surface was simulated by selecting contact element. The static characteristics of combination among drum body, roller and plate as well as additional vacuum suction inside cylinder were analyzed. The results showed that the maximum deformation and location of roller and plate are different in the three cases. The analysis of vacuum suction combination showed that in the condition of the combination between plate and roller surface, the size of deformation is based on the roller and the guiding groove on roller surface affects the deformation of piate, which in reality reflects the working state. The purpose was to provide theoretical basis for design and optimization of CTP imaging drum.