Abstract: The dual three-phase permanent magnet synchronous generator(DTP-PMSG) is widely used in high-end equipment due to its high-power density, high fault tolerance, and high reliability. However, the stator winding of the DTP-PMSG usually contains a large amount of harmonic current due to nonlinear factors, such as the distortion of the magnetic field in the motor air gap and the dead time of the rectifier switching device. The harmonic current increases system losses, reduces generator efficiency, and affects power generation performance, especially the 5th and 7th harmonics mapped to the x-y harmonic subspace. Since the impedance corresponding to this plane is small, even a small harmonic voltage disturbance can cause a large 5th and 7th harmonic current. To suppress the harmonic current in the stator winding, an adaptive disturbance rejection harmonic current suppression strategy based on double-loop synchronous rotation is proposed. A double-loop synchronous rotating coordinate transformation is used to map the 5th and 7th harmonics of the x-y harmonic subspace to its synchronous rotating coordinate axis system. In each loop, the adaptive disturbance rejection controller observes and compensates for the 12-octave AC component as part of the total disturbance of the system, achieving effective control of multi-dimensional harmonic current. Finally, experiments are conducted to verify the correctness and superiority of the proposed control strategy.