Stereo conversion device using piezoelectric driving module

The invention relates to a stereo conversion device using a piezoelectric driving module. The stereo conversion device comprises the piezoelectric driving module, a vibrating plate and a supporting portion, wherein the vibrating plate is in physical connection with the piezoelectric driving module, and the supporting portion is used for supporting the piezoelectric driving module or the vibrating plate at a fixed point. The fixed point is positioned on the inner side of the outer edge of the piezoelectric driving module, and an outer edge portion of the piezoelectric driving module and an outer edge portion of the vibrating plate vibrate freely by taking the fixed point as a central axis. Therefore, high-frequency sound and low-frequency sound can be made sufficiently by the aid of the piezoelectric driving module.