A brain hemorrhage of 70 ml is very serious. In clinical practice, if the brain hemorrhage is greater than 85ml, almost no patient can survive, no matter what treatment is used. And 70ml is already quite large, and such a huge bleeding volume will cause a sharp increase in intracranial pressure, which will easily lead to brain herniation, and endanger the patient’s life. At the same time, the bleeding volume will compress the normal brain tissue around the bleeding brain tissue, which will cause the extrusion between brain cells, thus causing acute brain edema, and the consequence of brain edema will also aggravate the increase of intracranial pressure. In addition, brain hemorrhage of 70 ml will also cause respiratory dysfunction of the patient, and once respiratory dysfunction occurs, it will lead to hypoxia of brain cells in the skull, and the consequence of brain hypoxia will aggravate brain edema, so it will lead to a series of vicious circle. Overall, its prognosis is poor and the disease is very serious.