Objective To explore the diagnostic value of CT angiography (CTA) in acute cerebrovascular disease. Methods Seventy eight patients with acute cerebrovascular disease treated in the Hospital from February, 2012 to February, 2015 were selected as research subjects, and the clinical data were retrospectively analyzed. All the patients underwent CTA examinations upon their admission, maximum intensity projection and surface shadow imaging technologies were applied to conduct three-dimensional reconstruction on images obtained, and CTA inspection results were compared to those obtained via digital subtraction angiography (DSA) or results found in surgeries to evaluate the diagnostic value of CTA on acute cerebrovascular disease. Results The accuracy of CTA in the diagnosis of acute cerebrovascular disease was 96.15%, and its accuracy on spontaneous intracranial hemorrhage, cerebral ischemic disease and cerebrovascular malformation hit 100%, and it also delivered high accuracy in the diagnosis of intracranial aneurysm at 90.63% (29/32), results of CTA in the diagnosis of acute cerebrovascular disease were roughly same to that shown in DSA or surgeries, and the differences were not statistically significant (p＞0.05) when two of them were compared. Conclusion CT angiography delivers diagnostic rate on acute cerebrovascular disease, and it can be used as preferred imaging examination method for diagnosis of cerebrovascular diseases in the department of neurology, be worthy of clinical promotion.