The invention discloses a piezoelectric fixed wing type wind speed measuring instrument. The bottom end of a stand column is fixedly installed on a pedestal. The external circumferential wall of the top end of the stand column is provided with external threads. Internal threads possessed by a position-limiting nut are connected with the external threads in a matching way. The position-limiting nut surrounding the top end of the stand column moves in a reciprocating way along a length direction of the stand column in a self-spinning mode correspondingly on the column body of the top end of the stand column via the internal threads and the external threads which are connected in the matching way. A slide tube, an annular piezoelectric ceramic pad and a spiral spring successively sleeve the column body, which is arranged between the pedestal and the position-limiting nut, of the stand column in a direction from the pedestal to the position-limiting nut. The slide tube, the annular piezoelectric ceramic pad and the spiral spring surround the stand column. The slide tube is matched with the stand column in a reciprocating movement mode along the length direction of the stand column. The external tube wall of the slide tube is fixedly provided with a fixed wing. The annular piezoelectric ceramic pad is fixedly connected with one end of the spiral sprig, and the other end of the spiral spring is fixedly connected with the position-limiting nut. The piezoelectric fixed wing type wind speed measuring instrument is reasonable and simple in structure, low in commercial selling cost, reliable in working and stable in performance so that high, medium and low wind speed can be accurately measured.