The fractional slot concentrated windings (FSCWs) lead to the disadvantage of large harmonic content, which can easily cause stator and rotor core loss and vibration and noise problems, and limit the application of FSCW in high-end fields. Based on a 12-slot 14-pole permanent magnet synchronous motor (PMSM) with FSCW, the finite element software is used to simulate and analyze the effect of flux barriers in the stator non-wound teeth on magnetomotive force harmonics, electromagnetic torque, core loss and radial electromagnetic force, and compare the motors with and without stator flux barriers. The simulation results show that the motor using stator flux barriers can effectively reduce the low-order harmonics of the winding magnetomotive force. The 1st, 3rd and 5th harmonics are reduced by 87%, 84% and 30%, respectively, and the core loss is reduced by 21.1%. The lower-order radial electromagnetic force is reduced by more than 20%. The noise and vibration are effectively suppressed.