Abstract: The electrical contact performance of the electrical connector is easy to change with environmental factors such as temperature, vibration, corrosion, etc., resulting in various intermittent contact failures of the electrical connector. Such failures have the characteristics of self-recovery, strong randomness, and are difficult to reproduce afterwards, which brings severe challenges to equipment availability and mission success. This paper studies the intermittent failure of electrical connectors caused by several typical environmental stresses such as temperature, vibration/shock, and salt spray, and qualitatively analyzes the environmental factors of intermittent contact failure. On this basis, an experimental study on the relationship between typical environmental stress and intermittent contact failure of electrical connectors is carried out. The results show that the temperature change rate, vibration magnitude and shock strength have the most obvious effects on the intermittent contact failures of electrical connectors, which are environmental stress parameters that need to be paid attention to in preventing intermittent contact failure of electrical connectors in engineering.