Abstract: In order to increase the power density of the interleaved parallel bidirectional DC-DC converter, reduce the core loss under high-frequency operation, and improve the overall efficiency of the converter, this paper proposes a new type of magnetic integrated inductor structure that uses segmented windings to optimize the design, in which two discrete inductors are integrated on an EE-type magnetic core by calculating the magnetic core air gap and the number of turns of each magnetic column. This method reduces the volume and weight of the magnetic component by 48.2% and 46.7%, respectively. Compared with the existing interleaved parallel magnetic integration scheme, the method can effectively reduce the saturation of the magnetic core, make the magnetic flux distribution on the magnetic core more uniform, reduce the hysteresis loss and eddy current loss of the magnetic core, and improve the system efficiency. Finally, the correctness and effectiveness of the design are verified through finite element simulation and experimental prototype.