Abstract: In order to effectively solve the poor adaptability of metro vehicle bogie development to the on-going requirements and the low reuse rate of parts, a design method of flexible product platform of metro bogie is proposed based on multiattribute decision and association design technologies. Then, the connotation of flexible product platform of metro bogie is defined, the construction method of common modules based on multi-attribute decision, and the construction of flexible modules based on association design technology are analyzed. On this basis, taking type-A metro bogie products as the example, the effectiveness, feasibility and practicability of this method are verified.