Hearing loss after brain radiotherapy can be restored to normal if there is no direct damage to the auditory nerve, but if there is damage, it is difficult to be restored to normal. Radiotherapy to the brain will lead to local edema, edema compression of the auditory nerve, will lead to transient hearing loss, these patients timely dehydration to lower the cranial pressure after the symptoms will gradually return to normal, does not affect life. Brain radiotherapy also has some damage to the surrounding tissues, especially the lesion is close to the nerve, once the nerve damage, often can not be recovered, this kind of patients will affect the hearing. Therefore, patients with brain radiotherapy should assess the possibility of nerve damage according to the location of the patient’s lesion and the radiotherapy, which can predict the probability of hearing recovery.