3,3-Dinitroazetidinium 3,5-dinitrobenzoate (DNAZ DNB) was synthesized, its thermal behavior was studied under a non-isothermal condition by DSC and TG/DTG methods. The intense exothermic decomposition process of DSC curves were analyzed to obtain its kinetic parameters. The specific molar heat capacity (C-p,C-m) of DNAZDNB was determined by a continuous C-p mode of micro-calorimeter, and the value was 416.81JK(-1)mol(-1)at 298.15K. Its detonation velocity (D) and detonation pressure (P) were estimated using the nitrogen equivalent equation according to the experimental density. The above results of DNAZDNB were compared with those of 3,3-dinitroazetidinium 3,5-dinitrosalicylate (DNAZDNS) and 3,3-dinitroazetidinium picrate (DNAZPA), and the effect of phenolic hydroxyl, carboxyl, and nitro group on them were discussed.