In this study, transcranial Doppler (TCD) was used to investigate the changes in intracranial arterial blood flow in migraine patients during attack interval. Methods: We recruited 20 migraine patients during attack interval to this study. The mean velocity (Vm) of blood flow in the anterior cerebral artery (ACA), middle cerebral artery (MCA), and posterior cerebral artery (PCA) was evaluated in all patients. Data were compared and analyzed with standards from the publication“Statistical Study of Normal TCD Ranges in Chinese Adults”. Results: The Vm of the PCA in migraine patients during attack interval was lower than that of normal people (P<0.05). The Vms of bilateral MCA and ACA in migraine patients during attack interval showed no significant difference compared to that of normal people (P>0.05). In migraine patients during attack interval, there were no significant differences in the Vms of the MCA, ACA, and PCA between the headache and non-headache sides (P>0.05). Conclusion: The Vm of the PCA in migraine patients during attack interval is lower than that of normal people, but the Vms of the ACA and MCA are not significantly different from those of normal people.