Cerebral edema is easily complicated after aneurysmal subarachnoid hemorrhage(aSAH),which leads to the aggravation of the patient's condition.Therefore,to clarify the risk factors,pathogenesis,diagnostic methods and treatment progress of global cerebral edema(GCE)after aSAH is of great significance for reducing the incidence of GCE and improving the prognosis of patients.This article mainly reviews the risk factors,pathogenesis,and treatment progress of GCE after aSAH,in order to provide early preventive intervention and improve the prognosis of such patients.