The invention belongs to the technical field of production of a transformer, and relates to a pre-magnetizing transformer with a voltage regulator and a manufacture method thereof. The technical scheme is as follows: the pre-magnetizing transformer with the voltage regulator comprises a primary side winding (1), the voltage regulator (4), a secondary side winding (2) and an auxiliary winding (3), wherein the primary side winding is arranged at the high voltage side of the transformer, the secondary side winding and the auxiliary winding are arranged at the lower voltage side of the transformer, the voltage of the auxiliary winding is lower than secondary side voltage, the current of the auxiliary winding is exciting current of an iron core, the phase of the auxiliary winding is the same as the phase of the primary side winding, and the auxiliary winding is connected with a secondary side lower voltage power grid through the voltage regulator. According to the invention, the voltage of the voltage regulator slowly rises, so that the auxiliary winding completes the excitation to the iron core of the transformer, a stable flux is established in the iron core, the misoperation of a relay in a main line can be avoided, and simultaneously, the harmful effect of the magnetizing rush current in a main loop can be eliminated. The product is more suitable for a power system with a smaller short circuit capacity. The invention can eliminate the action of on-load closing magnetizing rush current of the transformer.