Abstract: The coupling structures of conventional three-phase inductive power transfer（IPT） systems have serious cross-coupling, which affects the efficiency of the system. In order to eliminate the cross-coupling between the primary and secondary coils, the series-series topology is analyzed. Based on the decoupling principle of the DDQ pad, another DD coil, which forms a 90° angle with original DD coil of the DDQ pad, is placed above the DDQ pad so that the mutual inductance between the different coils is zero. Thus, a magnetic coupling structure for the three-phase IPT system is proposed. Finally, a 3.3 kW prototype is set up to verify the analysis. Experimental results show that the cross-coupling of the designed three-phase coupling structure is small and negligible. The maximum efficiency（DC-DC） of the system is up to 95.61%. When the system offsets by 15% and the internal decoupling is severely damaged, the system efficiency is reduced and the maximum reduction is 2.16%. The results indicate that the proposed approach is effective and can be applied to high power transfer.