Asymmetric triazole nitrogen-rich energetic compound 3-amino-3"-nitroamino-5,5"-bis-1H-1,2,4-triazole （3）was synthesized using 3-amino-1H-1,2,4-triazole-5carboxylic acid as raw material for the first time, and the product structure was characterized by IR, NMR and MS. Its thermal stability and decomposition process were studied by differential scanning calorimeter (DSC) combined with thermogravimetric analysis(TG). The results show that the decomposition temperature of compound 3 is as high as 160 ℃. The standard molar enthalpy of combustion (Δ_CH^θ_m) measured by an oxygen bomb calorimeter is -1952.25 kJ·mol^-1. The standard molar enthalpy of formation (Δ_fH^θ_m⁾ calculated and obtained according to Hess"s law is -336.245 kJ·mol^-1. The powder density measured by powder densitometer is 1.6137 g·cm^-3. The detonation pressure and detonation velocity predicted by EXPLO 5 program are 9.6 GPa and 5745.5 m·s^-1, respectively. The impact and friction sensitivities of this compound are 80 J and 360 N, respectively, which shows that this compound is a new type of insensitive energetic material.