In order to improve work efficiency and make the motor running more stable, the application of space vector pulse width modulation (SVPWM) in PMSM vector control system are researched and simulated. On the basis of vector control strategy and the theory of SVPWM, the simulation model of PMSM vector control system with electric current loop and speed loop based on space vector pulse width modulation (SVPWM) was established by using Matlab/Simulink. The simulation results prove that PMSM control system runs with faster response and smaller torque pulse than the traditional sinusoidal pulse width modulation (SPWM). The simulation wave accords with the theory research and PMSM system runs stable. It provides algorithm of PMSM vector control system improving with theoretical basis.