Cerebral hemorrhage, also known as cerebral hemorrhage, is a common disease among middle-aged and elderly people. The main causes of cerebral hemorrhage are hypertension, hyperlipidemia, cerebral atherosclerosis and diabetes; it is also closely related to bad habits such as smoking and alcohol consumption. It has a rapid onset and critical condition, and many patients often have serious sequelae, such as hemiplegia, aphasia or sensory impairment, despite active treatment, and is currently one of the main diseases that cause death in the middle-aged and elderly. In addition to conventional infusion, medication, rehabilitation or surgery, hyperbaric oxygen therapy is a good adjunct to treatment for cerebral hemorrhage. The mechanism of hyperbaric oxygen therapy for cerebral hemorrhage is: 1. Hyperbaric oxygen can reduce the cerebral edema caused by cerebral hemorrhage, and achieve the effect of lowering cranial pressure. 2, hyperbaric oxygen has the effect of scavenging oxygen free radicals, and reduce the damage of brain tissue caused by oxygen free radicals after cerebral hemorrhage caused by hypoxia. 3.Hyperbaric oxygen obviously increases the blood oxygen content and partial pressure of blood oxygen, increases the diffusion distance of brain tissue capillaries, and achieves to correct the state of brain tissue hypoxia, so that the brain tissue damaged by hypoxia can be repaired. 4.Hyperbaric oxygen has nerve repair effect, which can make damaged nerve repair and regeneration. 5.Hyperbaric oxygen can promote the neovascularization of blood vessels, which is conducive to the establishment of new cerebrovascular collateral circulation. Except for patients with contraindications to hyperbaric oxygen therapy, patients with hyperthermia, convulsions, agitation who cannot cooperate with oxygen therapy and patients with high blood pressure who cannot rush into the chamber, in principle, patients with cerebral hemorrhage without active bleeding, stable vital signs and no fresh bleeding confirmed by clinical review of cranial CT can be treated with hyperbaric oxygen therapy.