Abstract: Identifying the distribution of wind turbin blade flexural stiffness in practical scenarios poses a significant challenge. To address this issue, this study proposes a novel blade flexural stiffness identification method based on two key components: single point static load deflection fitting and a compact finite difference scheme. By establishing a comprehensive mathematical model that captures blade bending deformation under static load calibration conditions, this study derives precise expressions for deflection and anti-bending stiffness for each section of the blade. Extensive analysis on various blade types reveals that the anti-bending stiffness identification error in the midsection of the blade remains below 5%, thus validating the effectiveness of the proposed method.