High-reliability piezoelectric composite element and preparation method thereof

The invention discloses a high-reliability piezoelectric composite element and a preparation method thereof, and belongs to the technical field of piezoelectric composite materials. The high-reliability piezoelectric composite element comprises a piezoelectric composite material, a substrate and an electrode, the piezoelectric composite material comprises periodically arranged piezoelectric columns and flexible polymers filled between the adjacent piezoelectric columns; the upper surface and the lower surface of the piezoelectric composite material are respectively and fixedly connected with one substrate; the substrate is communicated with the piezoelectric composite material through electrodes, and the electrodes on the upper surface and the lower surface of the substrate are communicated through side edges. The high-reliability piezoelectric composite element can further comprise prestressed nails. According to the high-reliability piezoelectric composite element, the strong piezoelectric property of piezo