For the selection of suppliers of components and parts for SMMEs (small and medium manufacturing enterprises) and on the basis of the analysis of the advantage and disadvantage of AHP, a new kind of AHP called UVAHP is presented to overcome the disadvantage of AHP, which builds judgment matrix using uncertainly voting group decision making, and specially deals with interval number and uncertain linguistic value, and specially deals with profit attributive value and loss attributive value. The basic principle and calculating steps are given, and the corresponding mathematic model is set up. An example testifies the correctness of the method. This method has higher reference value for the selection of components and parts supplier.