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叶片的外形设计和翼型的选择等都能影响风机性能和产能效率。提出一种大型风能发电机组叶片反求再设计的原理和方法，通过对大型风能发电机组叶片反求测量、大型风能发电机组叶片逆向CAD建模，寻找几何特征，探索制约叶片形状的基本因素，确定叶片截面参数计算公式，利用所开发的叶片翼型自动生成系统，完成了叶片的再设计，并得到了实际应用。“,”The large?scale wind turbine blade contour design and the choice of wing section affect the wind turbine performance and energy efficiency. A redesign principle and method for large?scale wind turbine blade was presented which was based on the analy?sis of blade CAD model from reverse engineering, looking for geometric features, exploring basic constraint factors on blade shape, and determining parameters of blade cross section calculation formula. Blade design was completed using this self?developed blade aerofoil automatic generation system. The results show that the redesign meets the production requirements.