采用传统的无溶剂法和螺压工艺制备了以N-甲基对硝基苯胺（PNMA）为含能化学安定剂的HMX/Al-CMDB推进剂，研究了PNMA对推进剂的制备工艺、化学安定性、力学性能及能量特性的影响。结果表明，用PMNA部分或完全替代Ⅱ号中定剂（C2）后，甲基紫化学安定性试验试纸变色时间大幅度增长，表明含PNMA 的HMX/Al-CMDB推进剂的化学安定性显著提高，随着PNMA含量的增加，试纸变色所需时间增加。用PNMA替代C2后，推进剂的密度没有变化，爆热值增加52kJ/kg，能量有较大提高，对降低压强指数有利，但对推进剂力学性能以及制造工艺无不良影响。

A modified double-base propellant containing HMX and Al powder (HMX/Al-CMDB) with P-Nitro-N-methylamine (PNMA) as energetic chemical stabilizer was prepared by traditional solventless method and screw extrusion process. The effects of PNMA on the preparation process,chemical stability,mechanical performance and energy characteristics of HMX/Al-CMDB propellant were studied. The results show that the time needed for color change in methyl violet test is substantially increased when N, N′-dimethyl-N,N′-diphenylurea (C2) is partially or totally replaced by PNMA, indicating that the stability of the HMX/Al-CMDB propellant containing PNMA is significantly improved. The time needed for color change of test paper increases with the increase of the proportion of PNMA in the formulation. After the substitution of C2 by PNMA, the density of the propellant has no change, the heat of detonation increases by 52kJ/kg and the energy increases remarkably, which is beneficial to reduce pressure exponent and has no adverse effect on the mechanical property and manufacturing process of the propellant.