Every person mainly communicates with the outside world through hearing, reading, writing and information, among which the hearing function mainly relies on sensitive hearing to complete, a person with severe hearing is unable to hear clearly, resulting in inaudibility, poor speech and serious deafness. In order to improve the hearing ability, people have made unremitting efforts, various surgeries, hearing aids have played a great role, but for severe neurological deafness, there is no good method yet. It was not until the 1990s that the clinical application of cochlear implants brought a boon to patients with total deafness. A cochlear implant is an electronic device that replaces the function of the inner ear to help adults and children suffering from severe deafness. Cochlear implants have become the only effective treatment for restoring hearing to patients with total deafness. The nerve hair cells in the normal inner ear convert sound signals into bioelectrical signals that are transmitted to the auditory nerve and analyzed by the auditory center of the brain to produce hearing. 80% or more of severe or profound deafness is caused by damage to the nerve hair cells in the cochlea. Cochlear implant therapy for deafness is based on the principle that the cochlear implant device converts speech and sound signals into electrical signals (replacing the function of the damaged and missing hair cells) and then directly stimulates the auditory nerve to enable the patient to regain auditory function. The cochlear implant device consists of an in vitro device and an in vivo implant device. The in vitro device collects the speech signal and converts it into an electrical signal, which is digitized and coded according to a specific speech processing strategy and transmitted to the in vivo implant device through a wireless transmitter coil behind the ear; the receiving coil of the in vivo implant device receives the signal, decodes it with a decoder chip, and causes the electrode array of the cochlear implant to After the signal is received by the receiving coil of the in vivo implant, it is decoded by the decoding chip, and the electrode array of the cochlea implant produces a current with sound characteristics, which directly stimulates the auditory nerve to produce hearing.