利用高压差热分析和热重分析法研究了ＧＡＰ／ＡＮ推进剂主要组分的热分解性能。硝酸铵及硝酸酯的分解对压力比较敏感，是造成ＧＡＰ／ＡＮ推进剂压强指数高的主要原因；燃速调节剂ＭＯ对硝酸铵及ＧＡＰ的分解具有很强的催化作用，显著影响硝酸铵的低压分解，使其分解由吸热转变为放热过程，提高了推进剂在低压下的燃速，降低了压强指数。 The pyrolytic performance of the main components of GAP / AN propellants was investigated by high pressure differential thermal analysis and thermogravimetric analysis. The decomposition of ammonium nitrate and nitrate is sensitive to pressure and is the main reason for the high GAP / AN propellant pressure index. Burning rate regulator MO has a strong catalytic effect on the decomposition of ammonium nitrate and GAP, Low-pressure decomposition, the decomposition of heat from the endothermic transition into the exothermic process to improve the propellant at low pressure burning rate, reducing the pressure index.