The structural performance of wind turbine blades is of paramount importance as it directly influences the overall performance of the entire floating offshore wind turbine system. In this study, the deformation and stress distribution of the IEA15MW wind turbine blade are investigated. The research commences by precisely fitting the blade geometry in accordance with the distribution of airfoil parameters. Subsequently, a sophisticated 3D finite element model is developed using Abaqus. Under wind loads with both uniform and linear distributions, the stress and displacement distributions of the blades are analyzed in exhaustive detail. By carefully analyzing the maximum stress, the most dangerous region of the wind turbine blade can be accurately identified. The article also investigates the effect of different load directions on the magnitude of blade stresses. This research not only provides highly valuable insights for enhancing the design and safety of wind turbine systems but also holds significant implications for the burgeoning renewable energy industry. As wind power continues to play an increasingly crucial role in meeting global energy demands, understanding the structural performance of wind turbine blades becomes even more essential.