Transformer vibration and noise are mainly caused by the magnetostriction of silicon steel sheets. Since the magnetostriction of silicon steel sheets can be aggravated by the harmonic,the vibration and noise of transformer will be more excited if harmonic flux is flowed within transformer. In this paper,the vibration mode of the core of a four-column single-phase converter transformer prototype was built,and the influence of harmonic flux on the magnetostriction of silicon steel sheets were discussed. From the view point of acoustics,the relevance of harmonic flux and noise of transformer was verified. Second,based on the basic principle of inductive filtering method,the noise reduction feasibility of this method was theoretically analyzed. Finally,one 12 pulses rectifier system was built. The experimental data shows that the converter transformer noise can be effectively suppressed by using the inductive filtering method,and noise reduction performance of this filtering method is more preferable,compared with other traditional filtering methods.