给出了利用关键部件的寿命数据对复杂可修复系统可靠性进行评估时应注意解决的一个问题 :选取能充分反映系统性能变化的关键部件并且排除该关键部件在生产、存储、使用过程中自身不可靠的影响。进而给出了这个问题的解决方法及对系统性能的评估方法。最后 ,针对飞机发动机的一组寿命数据给出了计算实例 A problem that should be paid attention to when evaluating the reliability of complex repairable system by using the life data of the key components is to select the key components which can fully reflect the change of system performance and to exclude themselves from the production, storage and use of the key components Unreliable influence. And then gives the solution to this problem and the evaluation of system performance. Finally, a set of calculation examples are given for a set of life data of an aircraft engine