A new fluorodinitromethyl-containing energetic plasticizer 3, 4-bis (3-fluorodinitromethylfurazan-4-oxy)furazan was self-designed and synthesized. Its structure was characterized by FT-IR, ¹³C NMR, ¹⁹F NMR, elemental analysis, DSC and TG-DTG. Based on the calculated standard enthalpy of formation and the measured density, the detonation properties of 3, 4-bis(3-fluorodinitromethylfurazan-4-oxy)furazan were estimated by Kamlet-Jacobs equations and compared with those of commonly used plasticizing agents, nitroglycerine(NG), bis(2-fluoro-2, 2-diniroethyl)formal (FEFO), and 3, 3′-dinitrodifurazanyl ether (FOF-1). Results show that 3, 4-bis(3-fluorodinitromethylfurazan-4-oxy)furazan has good thermal stability (decomposition temperature of 197.8 ℃), high density(1.88 g·cm^-3), low melting point(50 ℃), which indicates that 3, 4-bis(3-fluorodinitromethylfurazan-4-oxy)furazan is an energetic plasticizer with excellent comprehensive performance.