For the new type of less-rare-earth hybrid-magnet motor, considering the actual electromagnetic characteristics of the motor is affected by the drive circuit and control strategy under different operating conditions，the method of field-circuit coupling was introduced. The complete motor and driving control system model was established based on ANSYS Maxwell and Simplorer platform.The electromagnetic characteristics and driving performance of the motor were analyzed and compared with the simulation results of MATLAB-Simulink. The research shows that due to the real-time information exchange between the electromagnetic characteristics of the motor and driving control circuit, the simulation results of the field-circuit coupling analysis method have higher accuracy and credibility, which provides a reference for the further design and optimization of the less-rare-earth hybrid-magnet motor.