Abstract:Based on the research of the basic characteristics, main methods and foreign experience of defense critical technologies, this paper puts forward the basic criteria and index system that should be followed in the selection of defense critical technologies from five dimensions of application key, development urgent need, technology feasibility, blockade limited and radiation driven. According to the research, the selection of defense critical technology is a decision-making process, which may lead to omission or unreasonable situation if it is completely ordered according to the quantitative indicators, therefore, this paper constructs a multi factor comprehensive evaluation model based on "criteria reduction + expert argumentation" by integrating quantitative data support and expert experience judgment, which provides support for the practice of defense critical technology selection.