In order to obtain energetic materials with excellent performance， a new type of energetic ionic salt 4-hydroxy-3，5-dinitropyrazole guanidine salt （DNPOG） was synthesized by nitration， hydrolysis， acidification and salt formation reaction with 4-chloropyrazole as raw material. The structure was characterized by FTIR， NMR and EA analysis. The crystal structure of DNPOG was triclinic with space group P-1， relative molecular mass M_r=233.17 g·cm^-1， a=4.8958（5） Å， b=8.1933（8） Å， c=11.9669（11） Å， Z=2， and crystal density D_c=1.750 g·cm^-3. The contribution of hydrogen bond and π-π conjugation in DNPOG to the intermolecular interaction force was calculated and studied， and the hydrogen bond accounted for 47%. The thermal decomposition characteristics were investigated by differential scanning calorimetry （DSC） and thermogravimetry （TG）. The peak temperature of the first decomposition was 212.5 ℃. The detonation and safety properties of DNPOG were studied. The detonation velocity is 7871 m·s^-1， the detonation pressure is 23.8 GPa， the formation enthalpy is -160.2 kJ·mol^-1， the impact sensitivity is 20 J， and the friction sensitivity is 240 N. The results show that DNPOG is layered accumulation， with good thermal stability and low sensitivity， which is a kind of low sensitivity explosive with excellent performance.