A novel melt-cast energetic compound bis（dinitromethyl-ONN-azoxyfurazanyl）furazan （BDNAF） was synthesized using 3，4-bis （3′-aminofurazal-4′-yl）furazan （BATF） and 2，2-dimethyl-5-nitro-5-nitroso-1，3-dioxane （DMNNDO） as starting materials via oxidation coupling， hydrolysis， bromization， reduction and nitration five-step reactions. The structures of the intermediates and the target material were fully characterized by infrared spectrum（IR）， nuclear magnetic resonance（NMR） and elemental analysis（EA）. The thermal behaviors of intermediate compound 3，3'-bis（nitromethyl-ONN-azoxyfurazanyl）furazan （BNAAF） and target compound BDNAF were investigated based on differential scanning calorimetry（DSC） measurement， and the physicochemical properties and detonation performances of BNAAF and BDNAF were estimated by Gaussian 09 program and Explo 5（v. 6.04）. Results show that the intermediate compound BNAAF directly decomposed at 106.4 ℃ without melting process， and the calculated density of BNAAF is 1.82 g·cm^-3， the detonation velocity is 8298 m·s^-1， and the detonation pressure is 29.0 GPa. The melting point of the target compound BDNAF is 95.4 ℃， the first decomposition point is 170.5 ℃ at the heating rate of 10 ℃·min^-1， and the theoretical density of BDNAF is 1.91 g·cm^-3， the detonation velocity is 9005 m·s^-1 and the detonation pressure 35.9 GPa， which revealed that BDNAF is a promising melt-cast explosive.