It is normal for a brain dead patient to have a heartbeat. After brain death, the heartbeat belongs to the state of plant survival, and it can usually be maintained for about one hour on its own, or it can be maintained by means of medical treatment nowadays. However, even if a brain dead patient has a heartbeat, there is no value in saving his life, and it will also cause a heavy financial burden to his family. The specific situation needs to be determined by the doctor according to the patient’s symptoms and signs. Brain death refers to total brain damage, including brainstem damage, and the damage to the whole brain is irreversible. There is a complete loss of function of the whole brain, but the heart has its own circulatory system and there is no direct connection between the two. The respiratory center is located in the brainstem, if the brain is dead, the patient will have no independent breathing, so there will be no heartbeat, if the application of modern medical means to make the patient have breathing, then the patient’s heart will continue to beat.