Congenital microtia is caused by abnormal development in the embryonic period, the auricle is severely underdeveloped, there is no normal auricle marking form, the ear area is only contracture, deformed small cartilage mass and ectopic earlobes, China’s incidence rate is about 1:2000, the need for surgical treatment, the operation usually takes 2-3 times. Anxious parents want their children to have a normal ear earlier, but to reconstruct a realistic shape of the ear, but also on the child’s mental health and schooling does not bring a big impact, the timing of the operation is very critical, so when is the operation better? A large number of clinical studies have found that children with microtia can be operated when they are about 6 weeks old, because the size of the ear is close to that of an adult at this age, and the impact on the child’s mental health and schooling is small. In adulthood, the rib cartilage gradually calcifies, hardens, and becomes brittle, which can make the surgery difficult and even affect the results.