Objective Explore the CT manifestation of cystic renal cell carcinoma,aimed at improving cystic renal carcinoma preoperative correct diagnosis rate. Methods Review 13 cases confirmed by surgery pathology,CT manifestation of cystic renal cancer,analyze the theca sac,separation,and the walls of solid nodules of CT signs and so on.Results 13 cases of cystic renal cancer 8 capsule wall thickness associated with wall nodule ,unclear wall nodule showed 5 cases;Pouch mixed density 6 cases;13 cases with solid tumor ingredients are strengthened .Conclusion Spiral CT enhancement is one of the important common check methods of cystic renal cell carci-noma.