For the reliability of the electric power steering system of the automobile steering wheel, the fault-tolerant control strategy based on the dual three-phase permanent magnet synchronous motors (PMSMs) under open winding faults is studied. A one-phase open winding is used as an example. By deducing the coordinate transformation matrix when the motor winding is open, a mathematical model of dual three-phase PMSMs under fault in the d-q axis coordinate system is established. Based on the decoupling transformation of the motor voltage equation, a current regulator architecture with feedforward compensation is designed, and a fault-tolerant control strategy with the minimum total loss of the stator is studied. The simulation results confirm that the control strategy can improve the performance of the dual three-phase PMSMs under phase loss fault conditions.