To explore the distribution characteristics of pressure,stress,strain and deformation of wind turbine generator system blades,find out the dangerous weak parts of the blades,and reveal the internal mechanism of their distribution characteristics,based on ANSYS Workbench platform,the bidirectional fluid-structure coupling method was used to calculate the flow field and solid field of a certain type of wind turbine generator system blades.The laws of the pressure,stress,strain,and deformation of the blade in the coupling field were explored,which provided theoretical support for the structural optimization design and manufacturing and fatigue fracture life calculation of the blade.The results show that the pressure distribution of the blade in the external wind speed field is consistent with the actual working conditions;the maximum stress and strain of the blade are located at the root of the blade,and the distribution characteristics of the stress and strain are “root high and tip low”;the maximum deformation position is located at the tip of the blade,and its deformation presents the characteristics of “radial-gradient reduction”.The above research results can provide reference for blade safety inspection,regular maintenance and optimization improvement,and have practical engineering value.