The combined transformer for wind power generation is a transformer that combines the boost transformer body, switching equipment, fuses, tap switches and corresponding auxiliary equipment. The high-voltage switches and fuses all enter the fuel tank, and the overall external size is small. Its structure is similar to the box transformer imported from the United States in the 1990s. It is called “wind power beauty transformer” in the industry. According to the product structure and component configuration, it can be divided into two types, one is a fully insulated box-type product; the other is a high-voltage box-type product with dry bushing.