Magnetic nanocomposites with core/shell structure are an important class of functional materials, and their comprehensive properties are affected by the microstructures of materials: they are largely dependent on the controlled sysnthesis of the composite systems. In this paper, we review the research advances in the preparation, characterization and performance of core/shell-structured magnetic nanocomposites, focusing on the following systems: 1) ferrite-based permanent-magnet/soft-magnetic(or antiferroma...