Congenital microtia (Microtia), or congenital external middle ear malformation, is characterized by severe auricular hypoplasia, atresia or stenosis of the external auditory canal, and malformation of the middle ear, while the inner ear is mostly normal in development and has some hearing through bone conduction. It needs to be treated by total earwax reconstruction and hearing function reconstruction surgery. Zuxia Ma, Department of Otolaryngology-Head and Neck Surgery, Zunyi First People’s Hospital The clinical features of patients with congenital microtia involve mainly the auricle, external auditory canal and middle ear, and the inner ear is often not involved. According to the degree of malformation, the most common clinical classification is three types: degree I: the size and shape of the auricle changes, but important surface markings of the auricle exist, the external canal is narrowed, and in severe cases, the external canal becomes atretic; degree II: the most typical, only the vertically oriented ear chakra exists, and the external canal is atretic; degree III: only a mass of skin and cartilage remains, and in severe cases, there is no ear. In congenital microtia, there are more than ten types of middle ear developmental disorders, mainly malformations of the auditory tuberosity, tympanic muscles and facial nerve, and they are closely related to the severity of the external ear malformation. In severe cases, congenital malformations of the external ear can manifest as one of the clinical signs of the sequence, such as the OculoCauriculoCvertebral spectrum (OAVS). In addition to microtia, patients have hemifacial shortening (temporal, maxillary or mandibular hypoplasia), soft tissue deformities (preauricular redundancy or macroglossia), eyelid defects (eyelid defects, conjunctival epithelial cysts), spinal deformities, and congenital renal and cardiac defects. Treatment: The treatment of congenital microtia consists of two main aspects, one is the reconstruction of the external auditory meatus and the other is the reconstruction of the auditory function. Generally, the external auditory meatus is reconstructed first, and then the hearing function is reconstructed. Hearing reconstruction surgery often destroys the skin behind the ear, so it should be performed after ear reconstruction. External auditory reconstruction. The normal auricle is composed of thin skin and soft tissue wrapped in elastic cartilage scaffold, with a thin elastic shell structure, and is composed of the ear wheel, the opposite ear wheel, the ear screen, the opposite ear screen, the earlobe, the ear nail, the triangular fossa, the navicular fossa, etc. It has a complex and convex shape, so auricle reconstruction is a difficult and complicated surgery. At present, although it is possible to create a reconstructed ear that is very similar to the normal ear, there are many factors that affect the shape of the reconstructed ear, such as the tightness, thickness and size of the skin behind the residual ear and the residual ear, and the length, shape and thickness of the rib cartilage used. Therefore, auricular reconstruction surgery can be performed on patients who require it, understand the difficulties of the surgery, and are realistic about the results; otherwise, caution should be exercised. Older and frailer patients should wear prosthetic ears and should not undergo ear reconstruction. For congenital middle ear deformity, the timing of surgery should be chosen: 1. For binaural deformity, external ear canal and middle ear molding should be performed before the age of 5 to ensure their hearing needs, and auricular molding should be performed after the age of 10. 2. For bilateral ear deformities, the normal ear of the father (or mother) should be used as the model. For monaural deformities, the ear model should be taken from the opposite side of the ear. 4.