本文从技术角度对发动机水下点火、水下发射进行了较全面的分析，着重分析了水下点火、发射方式和空泡过程三者之间的内在联系及其对出水弹道、水下航行体冲击振动的影响。通过分析得出结论：（１） 大深度、变深度、变航速和全天候发射是潜艇发射导弹着力追求的目标。采用发动机水下点火技术和弹道控制技术，是实现这一目标的重要手段，也是唯一手段。（２） 水下垂直发射技术是潜艇水下发射战术导弹的发展方向。（３） 为提高水下发射武器的作战能力、作战水平并适应现代海战的要求，自抛发射应是潜艇水下垂直发射战术导弹、采用水下点火技术的发展方向 This article from the technical point of view of the engine underwater ignition, underwater launch a more comprehensive analysis focused on the underwater ignition, firing mode and the process of the three intrinsic relationship between the bubble and the discharge trajectory, underwater vehicle The impact of shock and vibration. The conclusions drawn from the analysis are as follows: (1) Large depth, variable depth, variable speed and all-weather launching are the goals pursued by submarine launching missiles. The use of engine underwater ignition technology and ballistic control technology is an important means and the only means to achieve this goal. (2) Vertical launch underwater technology is the submarine launch tactical missile direction of development. (3) In order to improve the combat capability and operational level of underwater launched weapons and to meet the requirements of modern naval warfare, self-throwing launches should be submarine vertical launch tactical missiles, and the direction of underwater fire ignition technology should be adopted