Some automatic equipments often have high stability and disturbance suppression requirements to permanent magnet synchronous motors(PMSM), motor, and a high performance disturbance suppression control strategy is designed to apply to PMSM position servo system. This strategy utilize an equivalent input disturbance (EID) estimator to estimate and compensate disturbance the system suffered, use the backstepping control method to realize the stability, and adopt the current feedforward control to improve the system response speed of load mutation, realizing the optimization of the disturbance suppression performance of the system. The results of simulation showed that the designed disturbance suppression control strategy could maintain the system high accuracy of step response and signal tracking performance under the effect of disturbance, showing good stability and disturbance suppression performance, have some feasibility and reference value for the optimization of disturbance suppression control on the position servo system.