Objective To explore the technique of dual source dual energy CT lesions clinical application value in the kidney. Methods 78 cases of renal occupying lesionsin was in the Second People's Hospital of Xinjiang Kashi Region for treatment From January 2012 to August 2014. Enhanced scan were used routine CT scan and dual energy technique of dual source CT. The dual source CT scan results recorded in the observation group, routine CT scan as control group, compared the two groups of images and the CT value, and the radiation dose. Results In the observation group, 92.31%(72/78) the patients of the collected most of the image display, to meet the requirements of medical diagnosis. And the observation group in each part of scanning CT value had no significant difference with control group and SNR was significantly higher than that of control group, and the radiation dose of CTDIvoII, DLY and ED were significantly lower than those of the control group. The differences were statistically significant (all P<0.05). Conclusion The dual energy technique of dual source CT in lesions of diagnostic image quality is better in the kidneys, can meet the needs of examination. In addition, the scan results in considerable noise, CT value is relatively low, and the radiation dose is very low. It has higher value in clinical application, it is worthy of popularization and application.