Objective: To investigate the application value of dual-source computed tomography dual-energy angiography in carotid arterial. Methods: We retrospectively analyzed the images of 141 patients detected by dual- energy angiography,evaluated the quality of the images and used various reconstruction methods to analyze the pathological changes in carotid arterial. Results:High quality images were acquired in all of the 141 cases apart from 28 cases with no abnormalities and 9 cases showed normal variants of blood vessels,abnormalities of blood vessels were detected in 104 patients. 140 vessels with stenosis were detected in 99 patients with atherosclerotic plaque,including 6 patients with aneurysms,3 aneurysms and 2 arteriovenous malformation were detected in 5 patients without atherosclerotic plaque. Conclusion: As a non-invasive,cheap and convenient method,DE-CTA can remove bone in the neck and skull base,visualize stenosis,atherosclerotic plaque and aneurysms of carotidartery. DE-CTA possesses important effect to screen,diagnose,and track neck vascular diseases.