Subarachnoid hemorrhage is a clinical syndrome caused by a lesion at the base or surface of the brain in which blood ruptures and flows directly into the subarachnoid space. Also known as primary subarachnoid hemorrhage, it is a very serious and common condition. Subarachnoid hemorrhage requires emergency treatment. First, sudden and severe headache and vomiting with the possibility of subarachnoid hemorrhage must be promptly taken to the doctor. Second, try to keep the patient’s head in high lateral position to avoid backward tongue drop obstructing ventilation and timely cleaning of oral secretions and vomit to avoid respiratory asphyxia. Third, try to avoid long-distance transfer, and seek medical treatment nearby. Fourth, the patient should be escorted by medical personnel when being transferred, and the changes in condition should be observed at all times and necessary resuscitation measures should be taken. Before the transfer, treatment such as dehydration and hypotension should be given, sedative and analgesic drugs should be given, and absolute bed rest should be given. Avoid shaking as much as possible during transport. Ventricular puncture and drainage or lumbar puncture can be used to release hemorrhagic cerebral fluid when the bleeding is large. Head CT or lumbar puncture can confirm and diagnose, and actively look for the cause of intracranial artery or intracranial vein malformation to confirm and then perform surgical radical treatment. After the diagnosis of subarachnoid hemorrhage is confirmed, cerebral angiography or CT angiography should be improved as soon as possible. If the rupture of intracranial aneurysm is confirmed, craniotomy or vascular intervention embolization should be performed as soon as possible.