Taking certain type missile as an example, parameter was estimated with matrix method, optimal testing was fitted with X2 distributing test method, its reliable use life was estimated, and test cycle was determined in period. 并以某型导弹为例,用矩阵法估计参数、用皮尔逊X2分布检验法拟合最优检验,估计其可靠寿命,确定检测周期。