The invention provides an energy harvesting device. The energy harvesting device comprises an acoustic black hole plate, wherein the acoustic black hole plate comprises a plate structure and an acoustic black hole structure connected with the plate structure, the acoustic black hole structure specifically comprises a bending part and a piezoelectric recovery circuit, the bending part is connectedwith the plate structure, the thickness of the bending part is gradually reduced to a preset thickness from the connecting position of the bending part and the plate structure, the bending part continues to extend by the preset thickness to form a platform, the piezoelectric recovery circuit is configured to recover the kinetic energy of the acoustic black hole plate and convert the kinetic energyinto electric energy, the piezoelectric recovery circuit comprises a piezoelectric patch group, the piezoelectric patch group is arranged on the platform, and the piezoelectric patch group converts the kinetic energy of the acoustic black hole plate into an alternating current voltage. The energy harvesting device is advantaged in that the defect that vibration energy is not concentrated in the natural world can be overcome, vibration control and energy recovery are achieved in an acoustic black hole structure gathering area, and energy recovery efficiency is improved.