Structures of organic components in a new liquid propellant were identified by the nuclear magnetic resonance spectroscopy (NMR), and validated by the combination of chromatogram and IR (GC/IR). The components of the propellant were confirmed, including organic energetic oxydant, stabilizer and phlegmatizer. The content of every component was quantified by the reference material trans-butenedioic acid, according to the nucleus-carrying mass (NCM) of every component. The result of precision test with NMR is consistent with that with high performance liquid chromatography (HPLC). The relative standard deviation（RSD） obtained is 0.21% for organic energetic oxidant, 0.32% for stabilizing agent, and 0.11% for phlegmatizer, respectively. Results of recovery test are 99.9%, 99.9%, and 99.7% respectively.