本文对轴流风机所给原始叶型数据进行三维空间数值离散，建立全三元流场求解叶轮区域内网格的自动生成法。全三元流方法求解的结果表明，方法有效、简便、可靠。 In this paper, three-dimensional numerical discretization of the original leaf-typed data from the axial fan is made and an all-ternary flow field is established to automatically generate the mesh of the impeller. The results of solving all-ternary flow method show that the method is effective, simple and reliable.