In recent years, the poor endurance of electric vehicles has been one of the main problems that have limited the development of new energy vehicles. Improving system efficiency and reducing system losses are currently one of the main methods to improve endurance. A fast SVPWM (Space Vector Pulse Width Modulation Technology) algorithm is used to improve the traditional SVPWM judgment, simplifying the complicated coordinate transformation and trigonometric function calculation of the traditional SVPWM technology judgment. Then it is applied to MTPA (Maximum Torque Per Ampere) control for Simulink model simulation to verify the effect. The experiment proves that the MTPA control under the improved SVPWM algorithm has higher response speed and stability than the traditional id = 0 control. The size of the stator current is about 1-2A smaller than id = 0 control, which achieves better MTPA control.