Inductor structure and switching power supply

The inductor structure and the switching power supply comprise n inductors, n is larger than or equal to 1, each inductor comprises a first magnetic core, a second magnetic core and a coil, and the saturation magnetic flux density of the first magnetic core is different from that of the second magnetic core; the first magnetic core comprises a bottom plate and a first magnetic column extending from the bottom plate in the first direction, and the first direction is perpendicular to the bottom plate; the coil is wound on the first magnetic column; on a first plane, the second magnetic core surrounds the coil to form a first closed structure, the first magnetic core surrounds the coil to form a second closed structure independently or by multiplexing a part of the second magnetic core, and the first plane is a plane formed by the radial direction of the coil and the first direction. By means of the scheme, saturation current can be greatly increased, so that low loss and high saturation are both considered, the