A zigzag microstructure is proposed to power sensor nodes continuously, which equivalently lengthens its length and reduces its natural frequency compared with conventional straight piezoelectric cantilever. An analytical model is presented to study the zigzag structure vibration, an ANSYS finite element model is built, and the simulating verification is analyzed. The simulation results show that within the processing size limit of micro process technology, the first natural frequency of the structure composed of 8 straight beams is less than 200 Hz, which makes it possible to resonate with the environment vibration resource. Thus the effectiveness of the zigzag microstructure is demonstrated.