A novel energetic compound, 6-dinitroethylene-4, 5, 8-trinitro -5, 6, 7, 8-tetrahydro -4H-imidazo [4, 5-e] furazano [3, 4-b] piperazine (PNEIFP), was designed and synthesized from glyoxal and FOX-7 by two cyclizations and nitration. In addition, some properties of PNEIFP were calculated by Gaussian 09 program and VLW formula. The results show that its density is 2.02 g·cm^-3, and the detonation velocity is 9681.0 m·s^-1, and the enthalpy of formation is 724.1 kJ·mol^-1. PNEIFP easily decomposes at room temperature.