A large amplitude vibrator is designed based on piezoelectric ceramic to perform calibration of large amplitude vibrators. The actuating element is made of PZT8 material. A power amplifier and a LC resonant circuit which composes of inductance and piezoelectric ceramic magnify input signals and drive the vibration of piezoelectric ceramic. Vibration frequency ranges from 2 kHz to 5 kHz, the maximum amplitude reaches 7 μm and the distortion is lower than 5%.