To improve the safety of HMX without sacrificing. enemy properties. the composites of TNT and an energetic material (HP-1) were used to coat HMX particles by a method of integrating solvent - nonsolvent with aqueous suspension-melting SEM (scanning electron microscopy) and XPS (X-ray photoelectron spectrometry) were employed to characterize the samples The effect of the processing parameters. such as mass ratio of HP-I to TNT (MRHT). stirring speed. and cooling rate, on the quality 01 coated samples were investigated and discussed The mechanical sensitivity. thermal sensitivity. the decomposition characteristic, and heat of detonation of raw and coated HMX samples were also measured and contrasted Results show that when MRHT. stirring speed in the second stage and cooling late are 1 5. 1000 I min(-1) and 5 degrees C min(-1) respectively, the optimal coating effect is achieved Compared with that of raw HMX. both impact and friction sensitivity of HMX coated with 2 5 wt -% TNT and 0 5 wt -% HP-I decrease obviously. whereas there is a slight change in their thermal sensitivity and thermal decomposition chatacteristics Meanwhile, such surface coating, does not result in the decrease of its energy properties