In order to improve the conducting state of traditional capacitor filter rectifiers in fuse piezoelectric generator, a method was proposed using the valley-filling circuit to compensate the original fall of the active power output. Taking both the small output power of piezoelectric generator and the large instantaneous power change of fuse circuit into account, a novel model of energy storage filter circuit was established to more effectively use the energy. The circuit was simulated and calculated by Multisim simulation software. Simulation result shows that the circuit can improve the active power usage of the generator, increase both the continuity of power supply and the power factor of the circuit.