Abstract: Due to the improvement of overload capacity, power density and torque density of permanent magnet synchronous machine(PMSM), magnetic saturation becomes serious and changes violently. Its nonlinearity limits the dynamic performance of the current loop and reduces the robustness of the controller. Therefore, a gain scheduling current control strategy of PMSM is proposed in this paper. Based on the nonlinear magnetic saturation model with differential inductance, the linear internal model controller of the small signal model is designed. The nonlinear controller is interpolated with respect to the scheduling variable. The elimination of nonlinear coupling remains the consistency between the small signal of nonlinear control and linear internal model control. Then, the gain scheduling current controllers with different forms of nonlinear integration are obtained. Internal model control is used to keep the same closed-loop characteristics of the small signal system, so that the nonlinear control also has the same linear closed-loop characteristics, which achieves the effect of feedback linearization and improves the performance under a wide range of operating conditions. The effectiveness of the controller is verified by simulation and experiment.