Abstract: Ignition system is an important parts, and is a more easy failure parts. Based on the analysis of solid rocket engine's bridge-wire ignition system composition and working principle, the typical ignition system failure mode and the produce mechanism are talked about, for example, electrical subsystem's ignition battery can't be activated and functional components are wrong, and firing subsystem can't fire or abnormally fire, and energy release subsystem delay fire or explode, and so on. And based on the failure mode and the produce mechanism, some corresponding preventive and improve measures are offered. These measures are effective and valuable references for the engineering application of rocket engine's ignition system, for example, development, production and test evaluation.