根据模糊数学中的可能性理论引入了“故障可能性”的概念。推导了故障可能性分布的模糊数学表达式 ,并对故障可能性在串联系统模型中的分布情况进行了研究。给出了基于故障可能性分布的模糊综合评判法 ,以及根据该方法所得出的结果。论述了其如何在雷达接收机故障诊断中获取故障诊断数据 ,进行故障定位等的过程和方法 According to the theory of possibility in fuzzy mathematics, the concept of “fault possibility” is introduced. The fuzzy mathematics expression of the probability distribution of failure is deduced and the distribution of the possibility of failure in the series system model is studied. The fuzzy comprehensive evaluation method based on the distribution of the probability of failure is given, and the result based on the method is given. Discussed how to get the fault diagnosis data in the radar receiver fault diagnosis process and the method of fault location