Currently, there are several ways to diagnose cerebrovascular malformations, and in addition to a detailed physical examination by a physician, a number of ancillary tests are required to confirm the diagnosis: In general, cranial CT or plus angiographic CTA is used primarily to determine the presence or absence of bleeding, but also to see the relatively large vascular malformation lesion itself, but is very limited. Cranial MRI or coupled with angiographic MRA can determine not only the presence of bleeding, but also the vast majority of the vascular malformation lesions themselves. However, MRI may not be able to see smaller arteriovenous malformations, which also need to be clarified by arterial cannulation cerebral angiography, which is generally required before arteriovenous malformations can be treated because it provides a clearer, more visual and dynamic picture of the morphology and vascular dynamics of the malformation, and is able to see whether there is an accompanying aneurysm, whether there is a thick arteriovenous fistula, and other risk factors that can easily lead to malformation bleeding factors, whether for endovascular interventional embolization, craniotomy, stereotactic radiation is crucial. Doctor’s tip: Cerebrovascular malformation auxiliary examination can see the lesion situation and location more clearly, so that the doctor can understand the patient’s condition more clearly, in order to study the correct treatment plan. Therefore, patients should cooperate with the doctor for the examination and actively cooperate with the doctor for the treatment.