The invention discloses a piezoelectric wind energy collecting device applied in a high-voltage grid, and belongs to the technical field of the wind energy collection. A substrate is provided with a main shaft and a gate-type connector. An outer circle of a bearing and a through hole edge of a turntable center are fixed through the interference fit, and an inner circle is in the interference fit with the upper part of the main shaft. Three tile-shaped blades are uniformly distributed on the upper surface of a plate face perpendicular to the turntable. The top of an L-shaped bracket is fixed with the edge lower surface of the plate face perpendicular to the turntable. Three L-shaped brackets are uniformly distributed in 120 degrees. The right-angle inner side of the L-shaped brackets is provided with a first magnet. The middle of the main shaft is provided with an annular connector. One end of a cylindrical polish rod is circumferentially and radially fixed with the annular connector, and the other end is fixed with the horizontal ends of the L-shaped brackets through a limiting block. A slider of which the upper part is provided with a second magnet is in the clearance fit with thecylindrical polish rod. One end of a spring is connected with the annular connector, and the other end is connected with the slider. The spring is coaxially installed with the polish rod. One end ofa flexible piezoelectric material is fixed with the annular connector, and the other end is fixed with the inner side of the slider.