在叙述了引信全弹道安全（引信安全系统在目标区解除保险）系统几种常用设计方法的基础上，详细介绍了可装定电子定时器在引信全弹道安全系统中的应用方法及其原理和特点，本系统已在国家某重点型号中应用，其特点是：电路简单，抗干扰能力强，便于二次集成，采用弹上计算机装定定时时间，速度快，设计了故障自检测系统，可靠性高。 Based on the description of several commonly used design methods of fuze full ballistic safety (fuze safety system in the target zone), the application method of electronic timer with fuze and the principle of the whole ballistic safety system are introduced in detail. The system has been applied in some key national models. It is characterized by simple circuit, strong anti-interference ability and convenient secondary integration. The computer is used to set timing time and speed fast, and the fault self-test system is designed and reliable High sex.