Clinicians in China still generally use the WHO 1980 classification method, hearing loss of 71-90dB for severe deafness. In short, bone conduction hearing aids are effective for profound deafness, but it depends on the type of deafness and the specific situation of the patient. A hearing aid is a device that amplifies sound to improve sound perception in hearing impaired patients. Hearing aids do not restore impaired hearing to a normal level, but they can help some people with hearing loss to make the most of what they have left. Usually, only severely and profoundly deaf patients need higher-powered hearing aids to obtain adequate sound amplification. All hearing impaired patients with residual hearing who wish to improve their speech communication skills can be fitted with hearing aids after the aforementioned evaluation and preparation and after their condition has stabilized. Generally speaking, people with moderate hearing loss (i.e. hearing loss of around 60dB) benefit most from the use of hearing aids. In addition to hearing aids, there are also artificial middle ear implants and cochlear implants. It is recommended to visit a hospital to fully understand the patient’s specific situation with the help of a physician for appropriate treatment.