Objective To retrospectively analyze the value of computed tomographic angiography (CTA) on etiological diagnosis and progression evaluation in patients with emergent hemorrhagic stroke. Methods Eighty-nine patients with preliminary diagnosis of acute hemorrhagic stroke underwent CTA, then various bleeding causes were analyzed by post-processing.The stability of hematoma was evaluated according to the image features.Follow-up CT in 24 h were performed to show the development of hemorrhage. Results In 89 cases of patients with emergent cerebral hemorrhage, 83 cases had made clear diagnosis according to CTA, then the patients received specialized clinical management.The causes of hemorrhage were not clear in 5 cases (5.6%), and subarachnoid hemorrhage was found in the most of these patients, requiring further examination.Twenty-two cases of unstable hematoma were found by CT scan, and hematoma enlarged in 16 cases in follow-up scan, with an accuracy of 72.2%.Fourteen patients were diagnosed as persistent bleeding hematoma by CTA, among them 13 patients showed hematoma enlargement, with an accuracy of 92.8%. Conclusions CT scan can only evaluate the stability of the hematoma, but the CTA high density in the hematoma strongly suggests persistent bleeding in the hematoma.Emergency doctors can analyze the cause of cerebral hemorrhage, assess the progression of disease, timely diagnose, locate the bleeding point by CTA, and there is important value in guidance of treatment and surgical methods.