Sudden cerebral thrombosis usually results in facial paralysis, aphasia, paralysis of one limb, and in severe cases, coma, shock, or even central respiratory depression, resulting in life-threatening conditions. Therefore, in case of sudden cerebral thrombosis, it is important to observe the patient’s state of consciousness. If the patient is conscious and only shows symptoms of paralysis, call 120 immediately and ask for medical assistance. If the patient is able to swallow, give oral aspirin, preferably after biting and swallowing, so as to accelerate the increase of its anticoagulant effect. If the patient is unconscious, the patient’s breathing and heartbeat must be observed. If there is respiratory and cardiac arrest, cardiopulmonary resuscitation should be given immediately on the spot while waiting for an ambulance to come to the rescue. After going to the hospital, relevant tests must usually be completed immediately to confirm the diagnosis. If the cerebral embolism is within 6-8 hours, it is usually possible to apply urokinase thrombolytic therapy or use vascular intervention to unblock the blood vessels so as to minimize the sequelae.