Low-field nuclear magnetic resonance (LF-NMR) technology has the advantages of fast, nondestructive, continuous and accurate, which has attracted attention in the fields of cross-linking density, curing process monitoring and aging property evaluation of explosives and propellants. The basic principle of LF-NMR was introduced. The application of LF-NMR in the curing monitoring of composite solid propellants, cross-linking aging assessment of composite solid propellants and polymer bonded explosive(PBX), and aging property evaluation of new type fuel air explosives (new-type FAE) was summarized. It was proposed that the application of LF-NMR in the aging performance monitoring of explosives and propellants should be further studied, the problems of classification monitoring of different ¹H relaxation characteristics and establishment of correlation equations between relaxation characteristic parameters and key parameters of mechanical properties should be solved, and the application of key parameters——transverse relaxation time (T₂) of LF-NMR in the aging performance evaluation of explosives and propellants should be strengthened.