The invention relates to a piezoelectric-driven F-P cavity tunable filter, which belongs to the field of optical filtering. The invention comprises a pedestal, a slot, a micro-displacement platform adjusting knob, a micro-displacement platform, an adjustable optical frame, a fixed frame, a displacement amplification mechanism, piezoelectric ceramic piles, a bracket and an optical Bragg reflector. Because of adopting the piezoelectric ceramic piles as driving components, the invention can realize the micro-displacement variation of a macroscopic mechanical structure, and achieve the tunable filter function of an F-P cavity filter by combining with self-designed optical films. In case of applying a selfsame driving voltage on two piezoelectric ceramic piles, the two piezoelectric ceramic piles can move along the vertical direction, and the displacement amplification mechanism transfers the vertical displacements of the piezoelectric ceramic piles into an enlarged horizontal displacement of the optical Bragg reflector, thereby changing the length of the F-P cavity and achieving the purpose of optical filter.