A novel energetic material, 3, 5-dinitropyrazole-4-nitrate(DNPN), was synthesized via nitration and nucleophilic substitution reaction using 4-chloropyrazole as raw material, and its structure was characterized by FTIR, NMR and elemental analysis.The detonation performances of DNPN were calculated.The effects of sulfonitric acid composition and temperature on nitration was investigated, and the optimal condition was obtained as:V(98% nitric acid):V(98% sulfuric acid) =1:4, the reaction temperature 100 ℃, and the reaction time 5 h, with yield of 65.1%.4-Chloro-3, 5-dinitropyrazole with silver nitrate reacts fast, and the yield can reach up to 35.6% at 40 ℃ for 1 h.The detonation velocity and detonation pressure of DNPN is 8.78 km·s^-1 and 35.12 GPa, respectively, which is better than of TNT.