Brain death and also heartbeat belongs to brain death, death is divided into two kinds of cardiopulmonary death and brain death, brain death and also heartbeat belongs to brain death. Death is divided into two kinds of cardiopulmonary death and brain death, the traditional standard of cardiopulmonary death refers to the cessation of respiration and heartbeat; brain death refers to the irreversible loss of the whole brain function including the brain stem. Brain death also has a heartbeat when the loss of whole brain function is irreversible, and is therefore brain death. The diagnosis of brain death requires the fulfillment of three criteria at the same time, deep coma, loss of brainstem reflexes, and absence of spontaneous respiration. Prerequisites for brain death include a clear cause of coma and the exclusion of all causes of reversible coma. Brain death is irrecoverable and is the objective death of the brain stem, and the criteria for its determination are well established and used in clinical practice. There are specific criteria for the determination of death, which should be carried out by a medical professional and not by oneself.