探讨了飞机方案设计阶段应用决策方法的重要性;建立了飞机顶层设计方案优选的层次结构和评价指标体系;应用灰色关联度理论和方法建立了方案优选的灰色层次决策模型,并利用该模型对某飞机设计方案进行优选评价和敏感性分析,得到了满意的结果 The importance of the application decision-making method in the design stage of the aircraft is discussed. The optimal hierarchy and evaluation index system for the design of the aircraft top-level design are established. The gray relational degree theory and method are used to establish the gray level decision- A plane design optimization evaluation and sensitivity analysis, obtained satisfactory results