A simple, efficient and easy to manufacture floating island wave energy piezoelectric power generation device is proposed, and the piezoelectric ceramics of the floating island is deformed with the wave movement, and the obtained electric energy is stored and collected by parallel super capacitor after rectifying. Taken the multifloating island as the carrier, the piezoelectric effect is introduced to exploit the wave energy in the device which has the advantages of stable energy output, higher energy density and the ability to build a power generation network. The experiment results show that increasing the vibration frequency can effectively improve the current and efficiency of piezoelectric power generation equipment. Piezoelectric power generation device can replace or eliminate the batterypowered mode, adapt to selfcontained power supply needs of lowpower wireless sensor in the environmental monitoring, meteorological prediction, science and exploration, military supervision and other fields under the complex hydrogeological conditions.