A new energetic compound, 1-methyl-3-amino-5-nitro-1, 2, 4-triazole (DNMT), was synthesized using a new synthetic process from hydrazine dihydrochloride and methyl hydrazine as starting material via condensation, cyclization and diazo-reaction. The yield of DNMT was 62.3% and its purity was more than 99.4%. The structure of DNMT was characterized by IR, MS, NMR and elemental analysis. The condensation synthetical process were discussed in detail. The optimum reaction condition was as follow: alcohol as reaction solvent, n(C₂H₃N₄):n(NH₂NHCH₃·2HCl)=1:1.1, pH=8-9, hydrochloric acid as acidifying agent, acetone as recryctallization solvent.