Minimally invasive cochlear implant surgery is an advanced and precise cochlear implant surgery and electrode implantation method that has become mainstream in the international arena. In China, Prof. Dai Park of the PLA General Hospital firstly proposed the smallest incision suitable for each type of cochlear implantation. In fact, in addition to the small incision, the minimally invasive cochlear implant surgery also contains many exquisite designs and features: 1. Small skin incision: as small as 2 or 5 cm, with less bleeding and good blood circulation of the skin flap, There is no overlap between the incision and the implant placement position, which is suitable for early start-up. 2, myofascial flap mastoid contour incision: this design ensures that the myofascial flap incision is separated from the skin incision by more than 1.5cm, which ensures that the implant is protected by two layers of intact tissues and prevents the incision from splitting and the implant from being exposed. 3, the design of the mastoid bone eaves: to control the open range of the mastoid, less damage, the mastoid retains the bone eaves around the mastoid, so that the wire can have the best fixation in the mastoid (good for preventing the cochlear electrode from popping out and shifting). A bone lip is also preserved in the preparation of the implant bed and the intermastoid tunnel, so that the implant and wire are kept in an optimal position. 4. The round window membrane approach (for MED-EL cochlea) and the cochlear window approach under the round window membrane (for Cochlear Australia) will ensure that the electrodes are implanted into the tympanic membrane without damaging the cochlea structure, and will provide excellent protection for the cochlear bony helical plate, cochlear spindle, nerve fibers, and helical ganglion. With careful manipulation and medication, residual hearing can be maximized and the cochlear structures can be maximized to allow for re-implantation or more advanced treatments in the future. In summary, minimally invasive precision cochlear implantation provides the patient with the least amount of trauma possible, the most complete cochlear structure and function possible, good cosmetic appearance, and most importantly, a better recovery.