In order to improve the customer satisfaction and fairness of the complex product design and intelligent of the design itself, in this paper we use scientific and normative of the axiomatic design , made it as process and basis model of the complex product design, and give full play to its advantages in the design. On this basis, in order to shorten the cycle of the complex product design, and enhance the intelligence of the design itself. According to the customer we requirement the function feature, physical characteristics, process characteristics, we use the multiple instance reasoning knowledge to set up the corresponding multistage case database. Then according to the features to search the target in the multiple instance library. Through the feature matching to obtain the physical characteristics and the corresponding process. We would obtain the most satisfactory instance scheme, then based on the axiomatic design, repair and evaluation the examples that are searched ,in the end we acquire the most satisfied design of complex products. We through examples to verify the feasibility of the method.