High-voltage/low-voltage integrated substation for new energy power generation, a pre-assembled transformer substation that combines high-voltage switchgear, transformer core, and protective fuses within an oil tank, along with low-voltage switchgear and corresponding auxiliary equipment (hereinafter referred to as the substation). It is a step-up device that increases the voltage from new energy grid-connected inverters (or AC generators) to 10KV or 35kV, then outputs electricity to the grid through 10kV or 35kV lines. It is an ideal配套 equipment for new energy power generation systems.