分析了电子设备和武器装备的ＢＩＴ系统虚警形式之一——瞬态虚警的产生原因和一般的预防措施；提出运用灰色关联度和模糊贴近度对瞬态虚警进行辨识并给出了这两种方法的基本原理；分别采用数值模拟和物理模拟的手段，获得了具有温度、湿度、振动（电源）三环境参数系统的状态变化样本群，以及因振动（电源）参数突变而产生的瞬态虚警样本；运用灰色关联度和模糊贴近度方法识别虚警及产生虚警的环境因素，结果表明两种方法可以胜任要求。 This paper analyzes the causes and common precautions of transient false alarm, which is one of the forms of false alarm in BIT system of electronic equipment and weaponry equipment. It is proposed that the transient false alarm can be identified by gray relation degree and fuzzy close degree The basic principles of these two methods are respectively obtained by means of numerical simulation and physical simulation respectively, and a group of state variation samples with three environmental parameters of temperature, humidity and vibration (power supply) are obtained, and the result is a sudden change of vibration (power) parameter Transient false alarm samples; using the gray relational degree and the fuzzy close degree method to identify the false alarm and the environmental factors that generate the false alarm, the results show that the two methods can be competent.