A novel energetic material, hydrazinium 3, 5-dinitroamino-1, 2, 4-triazole(HDNAT) was designed and synthesized for the first time via condensation, nitrification and hydrazinolysis reaction with a total yield of 63.69%.It's structure was characterized by ¹H NMR, ¹³C NMR, FT-IR and elemental analysis.In addition, some main properties of physico-chemistry and detonation for HDNAT were obtained by test or calculation.Results show that its density is 1.89 g·cm^-3, melting point 194-196 ℃, friction sensitivity 92%, impact sensitivity 100%, H₅₀ 26.8 cm, detonation velocity 9000 m·s^-1(ρ=1.80 g·cm^-3) and detonation pressure 36.0 GPa calculated with VLM method.