In order to analyze the aeroengine comprehensive performance, the evaluation model was set up. Firstly, with different aeroengine working states the suitable flight data were selected as performance evaluation indexes. Then the analytic hierarchy process and fuzzy membership function were used to calculate the weight values and the normalization values of the performance evaluation indexes respectively, and the aeroengine comprehensive performance value was calculated by using the linear weighted sum method. The example analysis showed that, the aeroengine comprehensive performance value which was calculated by the evaluation model could well reflect the good and bad of aeroengine comprehensive performance and had an important guiding significance to the condition monitoring and fault diagnosis of aeroengine.