Al/CuO/PG nanocomposites were investigated in this paper as potential catalysts for the thermal decomposition of ammonium perchlorate(AP),where the high temperature decomposition of AP decreases from 424.4℃ to 312.3℃,showing its strong catalytic activity on the thermal decomposition of ammonium perchlorate. In addition, the more the catalyst was added,the more the high-temperature decomposition temperature of AP decreased.