Abstract: Focused on the issue of evaluating the ability of knowledge management in aviati on manufacturing enterprise, the knowledge resource in aviation manufacturing en terprise is analyzed, and a multiple index system to evaluate ability of knowled ge management in aviation manufacturing enterprise is presented. To evaluate the ability of it, it is difficult to give the value and the weight of indexes. A f uzzy AHP method based on triangular fuzzy numbers is presented to overcome the d ifficulty. It is more available and convenient to evaluate the ability of knowle dge management in aviation manufacturing enterprise. At last, a case is given to illustrate the application of the proposed evaluating method.