Objective To study the enhanced CT scanning and DSA (DSA) on hepatocellular carcinoma TACE (transcatheter arterial chemoembolization) residual tumor after surgery and the detection effect of new lesions. Methods The research object for 50 cases in our hospital were primary hepatocellular carcinoma patients, all the patients were treated by TACE and within six months after the operation were performed DSA and CT Reexamination, the comparison of the two imaging methods of tumor residual lesions and lesion detection. Results CT scan showed dense integer 29 cases, 12 cases of defect type, 9 cases of rare type. CT scan showed no obvious enhancement in arterial phase, there were 12 new lesions. By Das examination found that dense integer in 2 cases completely filled, assumes the circular high density, uniform density, boundary clear, tumor showed no staining, 27 cases of visible edge defect of oval lesion, uneven density, tumor staining obvious, visible blood vessels. Defect patients X-ray visible pale, like high density shadow, vascular tortuosity, tumor in the portal venous phase was pale staining. There were relatively weak perspective rare type. DSA examination revealed enlarged vascular manifestations of 36 cases of patients with peripheral embolism were detected, 34 new lesions. Tumor recurrence CT scan metastasis detection rate was 28%, DSA was 72%, CT scan small lesion detection rate was 24%, DSA was 68%. DSA tumor recurrence and metastasis detection rate and detection rate of small lesions were significantly higher than that of CT scanning, P<0.05. Conclusion CT scan can reflect the primary lipiodol deposition within the tumor of hepatocellular carcinoma after TACE, digital subtraction angiography (DSA) for small lesion diagnosis specificity and sensitivity.