To study the damage characteristics of typical anti-high-loading explosive under shock loading conditions,a series of shock damage experiments were conducted in casting explosive and pressed explosive based on card gap test. Different card thicknesses were used to achieve different damage degree. The damage characteristic of samples before and after shock loading were studied by use of CT system and Scanning Electron Microscope(SEM). The results show that the density changing of damaged samples are related to moulding techniques. The densities of explosive by casting moulding decrease and explosive by pressed fitting increase after shock damage experiments. The SEM of casting explosive results show that with the increase of shock strength,the interface debonding between explosive crystal and binder become more obvious and the microvoid become more bigger.