Abstract: Energy harvesting of environmental vibration is one of the most important strategies for ensuring that wireless sensors break the restricting of batteries’ capacity and serve for long time. By(considering of the type of piezoelectric films, various piezoelectric energy harvesters with miniature size were analyzed, including Pb-based perovskite, AIN and ZnO devices, as well as new lead-free devices. Piezoelectric harvesters with different architectures was also discussed, which were involved in energy harvesting devices with low resonant frequency and wide frequency bandwidth,respectively.