Abstract: The purpose of studying concrete using X-ray CT is to analyze concrete meso-crack evolution process and explain concrete macroscopic strength and strain character based on concrete CT images.The problem of concrete CT is that the functions of loading system and CT machine can not be carried out simultaneously.Based on current medical CT machine and special loading equipment,the real-time detecting can be realized on meso-crack evolution process ofⅠ,Ⅱgrade concrete under dynamic loading.The far demand is to make new CT machine to raise scanning velocity,make new special loading equipment to conduct the damage test toⅡgrade concrete under dynamic compression load.