In order to solve the serious harmonic contamination and transformers' vibration and noises of the existing high-power industrial rectifier system, harmonic magnetic flux suppression technology of transformer core based on inductive filtering method was proposed. Firstly, the new rectifier transformer and filtering device were analyzed and designed. Based on the harmonic suppressing principle of the new converter transformer and the view of harmonic magnetic flux suppression in transformer core, the inherent distinction and characteristics of the inductive filtering method on the harmonic suppression and the reduction of the transformers' vibration and noises were revealed. Then, this paper achieves the normal tuning of the filtering devices by measuring the phase differences between harmonic voltages and currents. A new DC power supply system was also established. In addition, the practical test results of the new DC power system have shown that the harmonics generated by rectifiers and loads are well suppressed and the vibration and noises of the transformers are greatly reduced.