The invention discloses a piezoelectric vibration energy collecting circuit, characterized in that it comprises a piezoelectric sheet, Positive Peak Detection Module, negative peak detection module, first inductance, first energy storage capacitor, A second energy storage capacitor and load, Pin 1 of the piezoelectric patch. the positive electrode of the positive peak detection module and the negative electrode of the negative peak detection module are connected, Pin 2 of the piezoelectric patch. one end of the first inductor and the negative electrode of the first energy storage capacitor areconnected, the negative electrode of the positive peak detection module, the output terminal of the negative peak detection module and the positive electrode of the first energy storage capacitor areconnected, the output terminal of the positive peak detection module, the positive electrode of the second energy storage capacitor and one end of the load are connected, the other end of the first inductance, the positive electrode of the negative peak detection module, the negative electrode of the second energy storage capacitor and the other end of the load are all grounded; The advantage isthat there are fewer energy dissipation elements in the circuit, which greatly reduces the overall power consumption of the LC loop in the circuit, improves the quality factor of the LC loop, and thusimproves the collection efficiency of piezoelectric vibration energy in the whole circuit.