Recently, the neurosurgery department of our hospital completed a case of typical anterior communicating complex aneurysm clamping. Patient: Female, 50 years old. She is a resident of Taoranting community. On October 1, 2013, she had a sudden onset of headache, neck strength, and limitation of limb movement. Head CT showed subarachnoid hemorrhage. He was admitted to the neurosurgery ward as “subarachnoid hemorrhage intracranial aneurysm” in emergency. After admission, he was given symptomatic treatment such as dehydration, cerebral protection and prevention of cerebral vasospasm. On October 14, 2013, a CTA examination of the head showed an intracranial anterior communicating artery aneurysm with a wide tip, which was caused by a localized bulge of the anterior communicating artery. The whole department discussed the case: the aneurysm was a wide carotid aneurysm, and interventional treatment was difficult. However, the aneurysm had ruptured once, and the risk of rupture again was extremely high, with a mortality rate of more than 50%. After the whole department discussed the case, the decision was made to perform a right additional access anterior communicating aneurysm clamping. The operation was performed under general anesthesia on October 16, 2013. The operation was performed by Yang Haifeng, the director of neurosurgery of our hospital. During the operation, we saw obvious intracranial arachnoid adhesions, which made the surgical separation and exposure extremely difficult. An aneurysm was seen on the left side of the anterior communicating artery, and the right side of the anterior communicating artery was slightly dilated. The Japanese Sugita aneurysm clip and temporal muscle reinforcement were given respectively. After surgery, he was returned to the ward. Postoperative symptomatic treatment was given to prevent vasospasm and cerebral protection. The postoperative CTA of the head showed that the aneurysm clamping was confirmed. He was discharged from the hospital on October 25, 2013. At the time of discharge, he was clear and articulate, and his limbs moved spontaneously. The patient was completely restored to normal. Case review: ruptured intracranial aneurysm is a common cause of spontaneous cerebral hemorrhage, and the condition is dangerous after rupture and bleeding. 1/3 patients die before admission, 1/3 patients die during or after waiting for surgery after admission, and 1/3 patients can clip or embolize the aneurysm after active treatment but some neurological dysfunction may remain. Aneurysm clamping surgery requires a high level of surgeon’s surgical skills and neurosurgical equipment. Not many medical institutions are able to perform intracranial aneurysm clamping under minimally invasive conditions, which requires better efforts from our neurosurgeons.