Abstract: In this paper,finite element models of a hydrostatic oil film-turntable system are established based on the actual working conditions to revolve smoothly and steadily,and decrease vibration.Modal analysis of the system is executed to study the system parameters' influences between the vibrational frequencies.By using response surface methodology,explicit function on the vibrational frequencies and the system parameters is obtained.Numerical results show that material elastic modulus and stiffness of oil-film combined with chamber numbers have effect on the frequencies of the system.Material elastic modulus has less impact on the lower order vibration frequencies,and significantly affects the higher order vibration frequencies.The stiffness of oil-film has increasingly influence on lower order vibration frequencies with the increase of the number of chambers.