To explore the feasibility and superiority of CT scanning technology in engineering detection,we make CT scanning for the typical fracture and fatigue loading,corrosive cracks and site concrete member and obtain the CT image for typical disease of components.The experimental analysis shows that a CT scan imaging can visualize the inside concrete defects and damages and carries on the quantitative analysis.With the development of CT scanners,portable CT will appear in the future,and CT scanning technology will play an important role in the concrete structure detection.