Device stacking structure of miniaturized power supply

The utility model provides a device stacking structure of a miniaturized power supply, which comprises a PCB (Printed Circuit Board), an input end, a rectifier bridge, an inductor and a transformer are arranged on the upper end surface of the PCB, and a first switch tube, a second switch tube and a third switch tube are arranged on the lower end surface of the PCB; the rectifier bridge, the inductor and the transformer are arranged in a mutually dispersed manner, and the first switch tube, the second switch tube and the third switch tube are arranged in a mutually dispersed manner and are all arranged far away from the input end; the projection positions of the first switch tube and the inductor on the PCB are overlapped, and the projection positions of the rectifier bridge, the transformer, the first switch tube, the second switch tube and the third switch tube on the PCB are staggered. The device stack is reasonable in structure and high in power density, can guarantee a better heat dissipation effect, impr