When the piezoelectric material is under cycle pressure, the cycle voltage is produced on its′ surface. The piezoelectric materials is fabricated into piezoelectric vibrator with sheet metal, the periodic oscillation of piezoelectric vibrator will continue to inspire charge in its surface, the electric energy is stored and transformed to be made into piezoelectric generator. the transfer principle of pressure piezoelectric energy is studied, and the piezoelectric energy transfer circuit is designed. The energy is stored and converted by using the valley fill circuit to replace the ordinary capacitance, the stabilizing voltage circuit and the experiment circuit are designed, the experiment is carried out through the shaking table, and to compare test through the system load, The experimental results confirms that using the valley fill circuit to replace the ordinary can improve the piezoelectric generator load capacity, the energy transfer circuit has no additional power supply.