The micro-displacement turret of ultra-precision CNC lathe was designed, which could meet the needs for precision machining. The power source of the turret was piezoelectric displacement actuators. The guide of the turret was double parallel four-pole flexible hinge institution. The main parameters of the turret were the maximum output displacement. The structure of micro-displacement turret was designed and calculated. The stiffness of flexible hinge institution was calculated by theoretical modeling and finite element analysis, and the output displacement of 2-D micro-displacement turret was tested. The results showed that the results theoretical calculations, finite element simulation coincided with experimental data, which could verify the reliable of the design method.