Abstract: To meet the high stiffness, high precision, and high damping requirements of medium to large precision and ultra precision equipment, a performance study was conducted on the typical application of hydrostatic units in liquid hydrostatic turntables. Firstly, based on the working principle of the built-in self-feedback hydrostatic unit, a hydraulic resistance model was developed, and the structural dimensions of the oil cavity were designed in combination with the characteristics of the zero-load condition. Secondly, by establishing a dynamic model, the influence of the throttling island side width c on the static and dynamic characteristics of the turntable was analyzed, and the range of c values was determined accordingly. At the same time, the influence of angular velocity ω on the performance of the turntable was studied. Finally, the characteristics of the turntable were analyzed and compared through simulation under different side widths and angular velocities. The results indicate that the method of designing oil cavity dimensions (excluding the c value) based on beginning conditions is reliable, and the dynamic model is effective and feasible. The optimal value of c is about 1/5 of the radial width of the oil cavity (c=9.5 mm), at which the turntable achieves the best performance, with a simulated stiffness of 11 512 N/μm and a theoretical bandwidth of 195 rad/s, which is far lower than the axial natural frequency. It's got super high stability and robustness. During operation, the speed can be adjusted according to the load to improve the serviceability of the hydrostatic unit.