The interfaces between RDX and binder are easily debonded because of improper bonding choice and pressing process conditions. The RDX-based polymer bonded explosives(PBXs) with F₂₃₁₁ and acrylonitrile-acrylate respectively were pressed by steel to study the pressing damage mechanisms. Results show that proper pressing conditions decrease the pressing damage in the shaping samples. The proper bonding improves the properties of the shaping samples. When acrylonitrile-acrylate is used in shaping RDX-based explosives, the properties of the samples are better than that of samples with F₂₃₁₁.