The invention discloses a piezoelectric vibration sensor. The piezoelectric vibration sensor comprises a sensor shell, an exciting power source, an exciter cavity body, an exciting steel hammer, a vibration sensing cavity body, a PVDF (Polyvinylidene Fluoride) piezoelectric sensor thin film and a control circuit, wherein the exciter cavity body and the vibration sensing cavity body are respectively arranged in the sensor shell; the exciting power source and the exciting steel hammer are arranged in the exciter cavity body; the exciting steel hammer is connected with the exciting power source; the control circuit is arranged at the top part of the vibration sensing cavity body; the PVDF piezoelectric sensor thin film is arranged at the bottom part of the vibration sensing cavity body; the exciting power source is electrically connected with the control circuit, and the PVDF piezoelectric sensor thin film is electrically connected with the control circuit. The piezoelectric vibration sensor disclosed by the invention has the advantages that the implementation is accurate, the structure failure information such as wear and fracture of a detected part can be acquired in real time.