Abstract:A portable test device based on the conventional medical CT scanner is developed;and a test system of rock-like material is formed. Some key problems in rock-like material test by CT are analyzed. Concrete test procedure of CT and some problems during test,including sample binding,alignment and fixing,are summarized. The preliminary dynamic pressure results of concrete by CT are given. And concrete crack rheological test by CT is carried out as well. The results indicate that this loading device satisfies the design demand. Concrete crack evolvement during dynamic loading process can be detected with a similar real time by CT;and crack rheological effect can be ignored in many cases. It has brought forth some new ideas to the study of dynamic behavior and damage law of rock-like material under dynamic loading.