Brain Arteriovenous Malformation (BAVM), AVM is an abnormal communication of arterial and venous blood vessels that occurs when the embryo develops up to 45-60 days, where there is no normal capillary network between the arteries and veins, but only abnormal malformed blood vessel clusters. Clinicians grade AVMs according to the blood supplying arteries, the size, location and depth of the malformed mass, and the depth of the draining veins. The lower the grade, the better the treatment; the higher the grade, the more difficult the treatment. 1, sudden severe headache, often accompanied by vomiting, sanity can be awake, can be blurred or even coma, may have numbness or weakness of the hands and feet, severe hemiplegia, speech and other neurological disorders. Especially during exercise or emotional excitement, most of them develop in adolescence. 80%-90% of patients with the first bleed of AVM can survive. 2. Convulsions, also known as epileptic seizures. 3, headache, more than half of the patients have a history of headache. The headache is often lateralized and can be relieved on its own. 4, Progressively worsening neurological impairment. When the above conditions occur, the doctor will recommend the patient to undergo CT, magnetic resonance imaging (MRI), cerebral angiography (DSA) examination, which can confirm the diagnosis. In terms of treatment, there are currently three types of therapies: craniotomy, endovascular embolization, also known as interventional therapy (which has developed rapidly in recent years), and stereotactic radiosurgery, also known as gamma knife and radio wave knife. For small non-functional AVMs, surgical resection can be performed, and for small functional AVMs, interventional embolization or gamma knife treatment can be considered according to the situation of the blood supplying arteries and draining veins; if the DSA shows a large flow rate, the effect of gamma knife treatment is not significant, and endovascular embolization should be performed first. For huge high-flow AVMs, the treatment effect is unsatisfactory no matter which way is used, and the risk is high. Depending on the condition of the AVM, endovascular embolization should be used to reduce the flow first, and then it should be decided whether it is purely surgical resection or Gamma Knife treatment, or surgery combined with Gamma Knife and other comprehensive treatments in order to achieve the cure or minimize the occurrence of complications as much as possible. With the current development of embolization materials, such as the introduction of marathon floating catheters and onxy gel, the embolization rate of AVM is getting higher and higher, and even some patients can be cured on their own after embolization with the reduction of flow in the residual part.