Abstract:To realize the drafting of the turbine blade body profile cross section line rapidly, with turbine blade structure characteristic being united, the characteristic of cross section line should be abstracted before generating the drafting. Taking some type of the turbine blade as the concrete example, the process of abstracting characteristic, drafting generating and automatic table dimensioning of the data leading-in generated exterior cross section line are introduced. The method of abstracting characteristic of exterior cross section of arbitrarily altitude of turbine blade is expounded in detail.