Abstract: <b<Purpose:</b< To elaborate the importance of CT science and technology play a important role in China economic development,summarize and analyze the relevant technique of CT in medical science,industry,geophysics and geology etc.examine realm of the application and the development present condition.Combining the technical new progress of Chinese CT industry in recent years have an important position in the domestic and international market. <b<Conclusion:</b< CT technology play an important role in development of Chinese economy;The industrial CT Technology of China is one of the advanced part in the world,play a competition role in that field.