Abstract: To improve the controllability and stability of the active hydrostatic spindle,a smaller control-cavitywas nested in each oil cavity of the traditional hydrostatic bearing, and the active single-side membrane restrictor was used to supply oil to it.The two-time throttling inside the bearing was fully utilized to realize excellent controll ability of hydrostatic bearing. Based on the Reynolds lubrication equation and the flow conservation equation, the dynamic axis orbit model of the hydrostatic spindle was established by the finite difference method and the Euler iteration method and the dynamic characteristics and control characteristics of the bearing under different bearing structures and oil supply pressures were theoretically studied. The results indicate that the hydrostatic bearing has both better dynamic characteristics and control characteristics while the width of the bearing land is 5 mm and the area ratio of the control-cavity is 30%.The well-designed hydrostatic bearing nested with control-cavity can improve the controll ability of hydrostatic spindle movement.