Abstract: In order to control the vibration of the hydrostatic turntable system,the bearing capacity of hydrostatic turntable system was expanded by the Taylor method,and the nonlinear oil film force was simplified equivalently as a spring- damper system.A finite element model was established for the hydrostatic turntable system.Based on this model,model analysis of the system was conducted to study the influence of the geometry parameters of oil chamber on the system dynamics.And harmonic response analysis was conducted to discuss the effect of the recess number,elastic modulus,equivalent oil film stiffness and damping coefficients on the system dynamic displacement.The results show that the natural frequency reduces with the increasing of recess outer radius,initial oil film thickness and recess depth.However,the natural frequency is increasing with the increase of oil seal width.It can be seen from the layout of the oil chamber,that the dynamic displacement of four recesses system is the least while the dynamic displacement of sixteen recesses system is the largest.Dynamic displacement in the low frequency range of the system is greater than that of the high-frequency range.This study provides reference for the dynamic design of the hydrostatic turntable system and for the improvement of machining precision of the turntable systems.