Microauricular deformity, unilateral more than bilateral. The right side is more than the left side, and men are more than women. People with microtia often have malformations of external auditory canal, middle ear and ossicles, so most of them have poor hearing and generally belong to conductive deafness. If both ears are square, hearing will be affected. Those with mild symptoms can wear appropriate hearing AIDS, and those with severe symptoms should undergo unilateral surgery first. If the external auditory canal is completely occluded, it is all bone or membrane, with only shallow concavity in the mouth, often lacking tympanic membrane, interrupted ossicular chain or stiff joint (fusion of malleus and incus, or orange bone fixation), losing sound transmission function, showing congenital conductive deafness, and bilateral patients may have language barriers. Treatment: according to the degree of deformity, external auditory canal plasty or tympanoplasty is done. X-ray examination must be carried out before operation to make clear the gasification of mastoid process and the development of middle ear and inner ear. Hearing and vestibular function should also be examined to understand hearing loss and vestibular function. The purpose of the operation is to improve hearing and plastic surgery. Age of operation, if bilateral external auditory canal atresia, 5-6 years old surgery is appropriate, do one side first, improve hearing as soon as possible, and let children study in ordinary primary schools. For example, if you are old, you need to do unilateral surgery to improve your hearing and restore your ability to distinguish the direction of sound, which is conducive to safety.