Most of the traditional motors use torque output,and the force on the motor is unbalanced in the radial direction.The double-stator double-acting couple motor balances radial force and outputs torque in the form of couple through special structural design.The double-stator double-acting couple motor has four working conditions:internal motor working alone,external motor working alone,joint working and differential working,which can output twelve different rotational speeds and torques.In order to study the radial force characteristics of the motor under different connection modes,the radial force formula of the double-stator double-acting couple motor was derived mathematically,and the radial force under each working mode was analyzed and simulated by MATLAB software.The results show that the radial force of the double-stator double-acting couple motor varies periodically in a certain range under different working conditions,and there are four connection modes with complete balance and partial balance of radial force.