A transformer test platform provided by the present invention comprises a single phase transformer, a voltage regulation winding, a high voltage joint, an on-load voltage regulation switch and a partial discharge model. The voltage regulation winding is connected with the high voltage end of a high voltage winding in the single phase transformer, the on-load voltage regulation switch is arranged on the voltage regulation winding, the high voltage joint is arranged in the middle of the high voltage winding, and the partial discharge model stretched into a transformer fuel tank of the single phase transformer via a sealing cylinder. Compared with the prior art, the transformer test platform provided by the present invention can generate a real partial discharge signal under the normal operation voltage of the transformer, so that not only the propagation process of the partial discharge signal along the high voltage winding of the transformer can be simulated, but also the high voltage winding of the transformer can be located in a rated voltage, and the high voltage insulation characteristic of a partial discharge monitoring technology and a partial discharge source positioning technology are convenient to research. Moreover, a partial discharge test and a winding local overheating test can be carried out simultaneously.