To overcome the intense decrease in coupling coefficient and transfer efficiency caused by deviation and deflection of the coupling structure of the WPT system, this article proposes a wireless power transfer system with a asymmetric coupling structure based on rotating magnetic field coupling. The transmitter adopts a DQDD coil, and the receiver adopts a CD coil. Firstly, the rotation characteristics of the magnetic field excited by the transmitting coil and the coupling route of the receiving coil under deviation and deflection are analyzed. The LCC-S resonant topology is constructed, and the component configuration and the system efficiency expression are derived. Secondly, the effects of winding, position and size parameters of coupling structure on mutual inductance and coupling coefficient are established; and the mutual inductance and coupling coefficient of DQDD-CD coupling structure under deviation and deflection are given. The superiority of the proposed coupling structure in resisting deviation and deflection compared with the existing six structure is analyzed. Finally, a 500 W prototype is built with a transmission distance of 130 mm under the conditions of 50% horizontal deviation and 90° vertical deflection, which evaluates the anti-deflection performance of the DQDD-CD magnetic coupling mechanism and the transmission energy efficiency of the system.