The analytical method of trace ionic impurities in 3,4-Dinitrofurazan (DNTF) was established using ion chromatography considering their significant effect up on the quantity control in this explosive preparation process. Precise quantitative determination of anions and cations existing in DNTF with and without refining had been performed. The concentrations of Na+, Mg2+, Ca2+, HCOO-, Cl-, NO-₂, and NO-₃ in crude sample are 53.3,5.5,2.4,2.6,1.8,2.8,8.2 μg·g-1, respectively, while those of the corresponding ions were obviously reduced after the product was refined. 