Abstract: This paper used state feedback to carry out the design, simulation and simulation debugging arbitrary pole of servo system. It includes servo system the identification, the establishment of the state space expression of the transfer function and state feedback coefficient matrix calculation, system simulation and debugging. State feedback system is studied with dead zone, saturation characteristics and interference characteristics of the output response curve.Through the analysis of the curve,we prove state feedback system response speed, good stability, and strong anti-jamming capability. The system parameter debugging is simple, easy to implement, circuit for the realization of the servo system has found a new way.