Abstract:With the comprehensive consideration of economy, environmental pollution, comfort and flexibility of an aircraft, a mathematical model is developed to evaluate the conceptual design of commercial aircraft by analytic hierarchy process (AHP). Multi-criteria is transformed to specific technique data by a quantitative method. An approach for a group of experts to evaluate one target is introduced to improve the reasonability of weight distributions. The proposed method is used to evaluate two conceptual designs for the commercial aircraft. As a result, the better design is selected in a reasonable way. The example shows that the proposed method can be used to make decision when design selection is needed in conceptual design of commercial aircraft.