Planar heteroaromatic compounds containing amino and nitro functional groups usually have excellent detonation performances. Hereby， the ─NH─ bond bridging two high-nitrogen fused rings was adopted aiming at constructing a nitrogen-rich energetic compound with a planar structure. The resulting compound is expected to have a regular packing in crystal and favorable detonation performance and stabilities. Reaction of 2，6-diamino-3，5-dinitropyrazine （2） with K₂CO₃ gives rise to 6-（2，6-diamino-3，5-dinitropyrazine）-1，2，4-triazole［4，3-b］［1，2，4，5］tetrazine （3） in a high yield of 81.3%. Compound 3 was characterized by NMR， IR， single crystal X-ray diffraction. The thermal decomposition process of 3 was studied by differential scanning calorimetry （DSC）， and its decomposition temperature （onset） is as high as 254.6 ℃. The detonation performances of 3 （D=7568 m·s^-1， P=23.5 GPa） were calculated by Gaussian 09 and Explo5 software.