To study the detonation performance of TATB based polymer bonded explosive (PBX) at high temperature, the sensitivity to shock wave, detonation velocity, detonation pressure and specific kinetic energy of the TATB based PBX at 25 ℃ and 75 ℃ were tested by standard gap test, electrometric method, standardization method, ZWB253-2008 and cylinder test, respectively. Results show that in comparison with those of 25 ℃, the shock wave sensitivity and specific kinetic energy of PBX at 75 ℃ increases, whereas the detonation velocity decreases slightly and the detonation pressure does not change obviously.