A novel dinitramine compound， 5，5''''-Bis（trinitromethyl）-2，2''''-dinitramide-3，3''''-bi（1，2，4-triazole） （3）， was synthesized via N-amination and subsequent nitration of the starting material 3，3′-bi（1H，1′H-1，2，4-triazole）-5，5′-bis（trinitromethyl） （1）. The structure of compound 3 was confirmed by X-ray single-crystal diffraction （XRD） and further characterized by infrared spectroscopy （IR）， elemental analysis （EA）， and nuclear magnetic resonance （NMR） spectroscopy. The enthalpy of formation for compound 3 was calculated using the isodesmic reaction method， while its detonation performance was predicted using the EXPLO5 code. Results indicate that compound 3 crystallizes in the monoclinic space group P2₁/n. The crystal density of the dihydrate （3·2H₂O） is 1.937 g·cm^-3 at 100 K. It exhibits an initial decomposition temperature of 92.6 ℃ and a calculated enthalpy of formation of 680.5 kJ·mol^-1. Furthermore， its predicted detonation velocity and pressure are 8926 m·s^-1 and 34.1 GPa， respectively， with a specific impulse of 257.7 s. Its integrated performance suggests its potential for use as an energetic oxidizer.