I. Psychological care The patients’ long-term speech and communication disorders and the delayed intellectual development of the children brought infinite pain and trouble to the patients and their families. Therefore, the urgent demand for surgery and high expectations of surgery are the direct cause of unsatisfactory surgical results. Using various ways (sign language, oral, written text, etc.) to communicate with the patients or talk to the parents directly, telling them that the key to improving hearing lies not only in the success of the surgery, but also that the more important issue is the ability to rebuild a new language environment after the implantation of cochlear implants, and that they should be psychologically prepared for long-term treatment. In particular, children with prelingual deafness are withdrawn and paranoid, and have a serious fear of surgery, making it difficult for them to cooperate with treatment and care. More contact should be made with the children, and their trust should be gained through constant counterpoint communication, so that they can accept the surgery and treatment in a good psychological state. The family members should be instructed to persevere in psychological counseling after discharge from the hospital, and help the patients to establish confidence in correctly treating the disease and rehabilitating their hearing. In short, cultivating a healthy psychological state is the key to the success of surgery. Second, the preoperative nursing staff knowledge preparation Before surgery, fully understand the patient’s condition, and discuss with the doctor about the possible complications after surgery, such as damage to the facial nerve, lymphatic fistula, infection, hemorrhage, labyrinthitis, wound non-healing, rejection, electrode failure, etc., and learn to observe, so as to achieve the care of the patient’s heart. Third, postoperative care 1, the observation of intracranial complications: because the surgery is the electronic cochlea inserted in the inner ear drum step, can touch the outer lymphatic fluid, for CT can not check out the inner ear malformation patients, intraoperative and postoperative lymphatic fistula; and the drum step of the outer lymphatic fluid through the cochlea tubule and the bead omentum, through the lowering of the cranial pressure after the operation and anti-infective treatment can reduce the incidence of lymph fistula, prevention of intracranial infections. In addition, it is more important to closely observe the patient’s basic vital signs, consciousness and pupil condition, check whether there is neck straightening, and take the initiative to ask whether the patient feels headache, nausea and other discomfort. 2.Prevent the electrode from falling off: fixing the electrode is the key to the success of the operation, therefore, the patient needs to be absolutely bedridden for 4 days after the operation. Nursing staff should give the patient a comfortable lateral position (the opposite side of the operation); keep the ward quiet, meticulous and considerate life care; advise the patient not to do strenuous head movements and mandibular activities, in order to enter the fluids, semi-fluid food is appropriate. 3.Observation and care of extracranial complications: Firstly, infection due to intraoperative injury or rejection of high mimicry and high density foreign body is the main cause of infection. Infection must be prevented by closely monitoring changes in body temperature and applying antibiotics in sufficient quantity. At the same time, the side effects of high doses of antibiotics should not be ignored. In addition, the oral, respiratory, and urinary tract systems should be well cared for to prevent all possible nosocomial infections. Secondly, the surgical approach to the facial nerve saphenous fossa via the mastoid process touches the facial nerve and may cause facial paralysis. Postoperatively, patients should be carefully monitored for the presence of facial twitching, gaps in eyelid closure, and loss or loss of taste during eating. In addition, there are some symptoms of vertigo, nausea and vomiting due to labyrinthitis, as well as a feeling of fullness in the middle ear due to middle ear effusion. 4. Hearing and speech rehabilitation: As the cochlear implant device cannot fully simulate the cochlear function of normal people, what is obtained is only limited auditory information, and there are distortions or aberrations in the received sound. In order to make deaf people reach the level of language communication, patients should be encouraged to adhere to long-term rehabilitation training after surgery. For example, the patient should be trained to pay attention to environmental sounds, words, sentences, etc., and to recognize and discriminate between them, as well as to understand them auditorily. In addition to insisting on completing the auditory training course, when discharged from the hospital, family members should be instructed to urge the patient to use the cochlear implant device as much as possible for self-training in daily life, such as listening to the radio, watching TV, and so on.