The properties of 1,3,3-trinitroazetidine(TNAZ) (physic-chemistry,thermal stability,eutectic,detonation,crystal and safety properties) are reviewed,the latest progresses on the military (such as gun propellants,melt cast explosives,and propellants)and civil (suah as inflating airbags and fire-extinguishing devices)applications in recent years of TNAZ are introduced in detail. It is consisted that the properties of TNAZ are superior,and TNAZ is one of the most prosperous high energy density materials currently. And the suggestions are also proposed for future studies of TNAZ.