In automotive electric power steering (EPS) system, the dead-time problem of the inverter is the main factor affecting the output performance of the steering motor, which is manifested by an increase in the current harmonic content. The dead-time problem causes motor torque ripple and increases the additional loss of the motor. The dual three-phase permanent magnet synchronous motors adopt two sets of stator windings with 30° phase shift. The content of the sixth harmonic current is reduced by the double dq coordinate transformation control, and the total harmonic content of electromagnetic torque is reduced. Simulation results show that the proposed method is correct and effective.