The permanent magnet synchronous traction machine was a typical nonlinear multivariable coupled system, there was crosscoupling between dqcurrents in synchronousframe, the dqcurrents could not be decoupled by the traditional PI, a combination of high performance permanent magnet synchronous traction machine control method based on the intima of the control principle and space vector algorithm decoupling was proposed, the internal model control (IMC) was used to control an ideal motor decoupled model, which was designed to dynamic decoupling of the stator current crosscoupling potential, the system dynamic response performance was improved,the robustness of parameter uncertainties and disturbances in the current loops was satisfied, extra motor parameters and hardwares were not necessary in this method, the experimental results showed the feasibility and effectiveness.