Cochlear implantation is currently the only effective treatment for severe and profound sensorineural deafness. Complications of conventional cochlear implantation: 1. Wound complications – most common, about 4%. a. Infection, flap necrosis, implant protrusion. b. Hematoma. c. Osteoarthritis (2%). d. Osteoarthritis (2%). e. Otoarthritis (2%). 2. Otitis media (2%). 3. 3. Damaged or displaced electrodes (1%). 4. Persistent cerebrospinal fluid leakage (1%). 5. Facial paralysis (0.5%). 6. Meningitis (3%). Minimally invasive cochlear implantation is favorable for good postoperative rehabilitation because it preserves the cochlear structures such as the basilar membrane, cochlea, vascular pattern, and bone helix plate. We are the first in the province to develop this technology. The minimally invasive implantation of cochlear implantation is innovative in two aspects: one is to reduce the surgical incision and minimize incision complications; the other is to improve the electrode implantation technique and retain the residual hearing. Specific operations include: 1, 2.5-3 cm small incision instead of the traditional 6 cm large incision; 2, skin, subcutaneous incision position misalignment; 3, the use of small intraoperative cavity; 4, the use of the round window membrane approach to insert electrodes instead of the traditional drum capsule punching method; 5, implementation of the concept of “soft surgical” electrode implantation; 6, other: ① intraoperative in the round window niche exposure but the electrode implantation method; 6, other: ① intraoperative in the round window niche exposure but the electrode implantation technique to retain the residual hearing. During the operation, when the round window niche is exposed but not yet cut, local dexamethasone can be used for a few minutes. ② Systemic application of hormones 5 minutes before the opening of the window or the incision of the round window membrane during the operation. (iii) Postoperative systemic application of antibiotics and steroids for 5 days to achieve anti-inflammation and prevention of cochlear fibrosis while protecting residual hearing. From October 2011 to August 2015, 200 cases of children with sensorineural deafness were admitted to this program. After perfecting the preoperative examination and considering that there were clear surgical indications and no contraindications for surgery, minimally invasive cochlear implantation was used to treat the children, and the surgical process was smooth, and compared with the traditional method, the bleeding was reduced significantly, and there was no unpredictable critical emergencies in the middle of the process, and the intraoperative monitoring showed that the waveforms were well-differentiated. Postoperative monitoring showed good waveform differentiation; Postoperative incision healing was good; there was no case of incision infection, hematoma, or poor healing; there were no complications such as implant bulging or exposure; postoperative CT showed that the electrode implantation was well positioned, and there was no case of electrode displacement or dislodgement. The children responded well when the implant was turned on 15 days after the surgery, and the test data showed that the hearing of the affected ears had been improved to different degrees, which was more obvious than the traditional surgical method and avoided the complications of the traditional surgery.