The invention discloses a double-pie solenoid high-frequency transformer in which a transformer is placed in a sealed steel cylinder. The double-pie solenoid high-frequency transformer is characterized in that primary single-pie coils and secondary double-pie coils are mounted on a button stem; a supporting rod is arranged at the lower end of the button stem; a secondary overlapping voltage equalizing component and a primary overlapping voltage equalizing component are arranged on the supporting rod; two joints are led out from each group of the secondary double-pie coils mounted on the button stem and are connected with the secondary overlapping voltage equalizing component; and one joint is led out from the primary single-pie coil and is connected with the primary overlapping voltage equalizing component. Through the double-pie solenoid high-frequency transformer, the problems that in the prior art, an annular high-frequency autotransformer has a huge volume, requires special cooling equipment, is not suitable for low-power push-pull application and adverse to the integral matching application with a low-energy accelerator and the like are solved, and a double-pie coil type voltage transformer which has a compact structure, is convenient to safely disassemble, and can increase the number of turns of the coils on the button stem with the same length is provided.