There are no up-to-date treatments for unilateral deafness. Currently, the hearing interventions available for patients with unilateral deafness include air-conduction hearing aids, bone-conduction hearing aids and cochlear implants. 1. Air-conduction hearing aids: The most commonly used hearing aids are signal-to-signal hearing aids, which are still the preferred treatment because they are affordable and do not require surgery. However, it may affect the aesthetics, cause discomfort in the external ear canal on the healthy side, amplify loud signals without selectivity, and even cause pressure headaches. 2. Bone conduction hearing aids: Bone conduction hearing aids are suitable for patients who have no indications for air conduction hearing aids, such as narrowing of the external auditory canal, atresia, long-term pus and eczema, etc. They are also used for patients with unilateral/bilateral conduction deafness, unilateral mixed deafness, and unilateral severe sensorineural deafness. 3. Cochlear implantation: When the hearing loss in the affected ear reaches severe or above sensorineural deafness, the criteria for cochlear implantation are met. Research has shown that cochlear implantation on the affected side will not affect the speech comprehension of the healthy ear, and the brain is able to integrate the electrical stimulation and auditory stimulation signals to improve the hearing on the affected side at the same time. Long-term unilateral hearing loss not only causes difficulty in locating the sound source, speech recognition under noise and quality of life, so patients with unilateral deafness should have hearing aid intervention and auditory-linguistic rehabilitation as soon as possible, but the specific treatment should be chosen according to the type of lesion and the degree of disease under the advice of the doctor.