Abstract:【Abstract】 Objective To explore the clinical diagnostic value of MRI on vascular trigeminal neuralgia. Method Seventythree patients with vascular trigeminal neuralgia were enrolled in our study and accepted axial and coronal MRI examinations including T1WI, T2WI, T2Flair, 3DCOMSIC, 3DTOF, DWI, and enhancement scan of the threedimensional volume interpolation of the rapid disturbance phase gradient echo sequence. Results The trigeminal nerve of seventytwo cases in patients with oppressed abnormal blood vessels were observed. One case was missed diagnosis. Eleven cases had two blood vessels compressed together, and one case had three blood vessels compressed. Fortyseven patients had neuralgia caused by artery compression, twentythree cases were caused by venous compression, and three patients had neuralgia caused by compression of vascular malformation. Conclusion Classification and evaluation of the vascular trigeminal neuralgia could be well achieved by MRI which may play an important role in the diagnosis of the vascular trigeminal neuralgia