An insensitive explosive with high nitrogen content and high standard enthalpy of formation,3,6-bis(1H-1,2,3,4-tetrazol-5-yl-amino)-1,2,4,5-tetrazine was synthesized using triaminoguanidine nitrate and 5-aminotetraazole as starting materials. This synthesis is a four-step process,including cyclization,oxidation and dehydrogenation followed by nuclcophilic substitution. The structure of the obtained compound has been identified by IR,¹H NMR and ¹³C NMR spectra,and element analysis. Some important properties of BTATz have been determined and are as follows: density of 1.76 g·cm^-3,melting point of 264～285 ℃,detonation velocity of 7 520 m·s^-1,combustion velocity of 5.6 mm·s^-1(101 kPa),pressure exponent 0.49,exothermic peak temperature of 320 ℃(DSC method). It is expected that BTATz might be promising in applying to insensitive explosives and low signature propellants.