The insensitive high explosive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) was selected for coating and desensitization of hexanitrohexaazaisowurtzitane (CL-20), another high explosive, after surface modification. About 1wt% Estane as a binder and 5wt% TATB as a deterrent were adopted in the preparation process, to obtain CL-20 based PBX by water slurry method, and SEM, XRD, DSC and impact sensitivity test were conducted. The results showed that TATB can be coated on the surface of CL-20 effectively, and the form of CL-20 didn´t change during the whole preparing process. Compared with CL-20/Estane without TATB, the thermal explosion critical temperature is increased 0.08℃,and the activation energy is increased 7.09 kJ·mol-1, the impact sensitivity of coated sample is reduced significantly, the characteristic drop height (H50) is increased from 30.64cm to 44.57cm, increased 45.5%.%使用钝感炸药三氨基三硝基苯(TATB)对高能炸药六硝基六氮杂异伍兹烷(CL-20)进行包覆和降感处理，制备过程中以1%的Estane作为粘结剂，5%的TATB作为钝感剂，采用水悬浮法制备了CL-20基PBX，并对其进行SEM、XRD、DSC以及撞击感度性能测试。结果表明：TATB可以有效地包覆在CL-20表面，在包覆过程中CL-20晶型未发生改变；与未添加TATB的CL-20/Estane粘结炸药相比，热爆炸临界温度提升了0.08℃，活化能提高了7.09kJ·mol-1，并且其撞击感度明显降低，特征落高(H50)由30.64cm提升至44.57cm，提升了45.5%。
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