In order to explore the application prospects of a new high-energy oxidizer ammonium dinitramide （ADN） in thermobaric explosives， ammonium perchlorate （AP） was replaced by ADN to prepare five formulations of thermobaric explosives with different ADN/AP mass ratios （AP， ADN∶AP=1∶3， 1∶1， 3∶1， ADN）. The mechanical sensitivity and thermal stability of the formulations were tested by impact sensitivity instrument， friction sensitivity instrument and differential scanning calorimetry （DSC）. The energy level of five different formulations was calculated by Explo5 software， meanwhile relevant energy parameters were measured by combustion calorimeter and detonation calorimeter. The results indicated that the characteristic drop height of impact sensitivity and the explosion probability of friction sensitivity of the fomulation using pure AP as oxidizer were 17.9 cm and 12%， respectively. But as soon as AP was replaced by ADN in various mass fraction， the characteristic drop height of impact sensitivity and the explosion probability of friction sensitivity of the corresponding formulations increased by 7.9-12.0 cm and 20%-28%， respectively. As the ADN/AP mass ratio increased， the peak temperature of exothermic reaction initially increased and then decreased. The highest exothermic peak temperature was observed when the mass ratio of ADN∶AP=1. When the mass ratio of ADN/AP≥1， the components in the formulations interacted intensely， resulting in a single sharp exothermic peak in a DSC curve. When the mass ratio of ADN∶AP=1， the formulation exhibited an impact sensitivity of 28.1 cm， a friction sensitivity of 32%， and a thermal decomposition temperature of 277.9 ℃. The combustion heat and detonation heat of the formulation were 13874.4 and 7666.9 kJ∙kg^-1， respectively.