High-impedance transformer

The invention discloses a high-impedance transformer. The high-impedance transformer comprises an iron core and a coil, wherein the coil wraps the periphery of the iron core and sequentially comprises a medium-voltage winding, a high-voltage winding, a voltage regulation winding and a low-voltage winding from inside to outside. By the high-impedance transformer, the high-low and medium-low impedance values of the transformer are increased, the short circuit withstanding capability of the transformer is effectively improved, and the loads of the high-voltage winding and the medium-voltage winding are significantly reduced.