Piezoelectric vibration sensor

The utility model relates to a piezoelectric vibration sensor, which comprises a shell (1) and a piezoelectric transducer sheet (2), and is characterized in that an accommodating cavity (11) which is used for accommodating the piezoelectric transducer sheet (2) is arranged inside the shell (1), the piezoelectric transducer sheet (2) is of a strip shape, and one end is adhered onto the end part of the accommodating cavity (11), and the other end is of a suspension free end, so a cantilever beam structure is formed. Compared with the prior art, the piezoelectric vibration sensor has the advantages that: by adopting the cantilever beam structure which is formed by the strip-shaped piezoelectric vibration sheet as a sensing element, the signal is easy to fetch, the size is small, the sensitivity is high, and the signal detection range is large.