Before the age of 3 is a critical period for the development of a child’s language function. If a child is found to have delayed language development, it is important to seek medical attention as early as possible to investigate whether there are hearing abnormalities so that the best time for intervention is not missed. Language is the product and symbol of human civilization and an important tool for communication between people, who express what they see, hear, think and think through the arrangement of words and sentences. However, this seemingly ordinary ability is not available to everyone. Many children are slow to speak at an age when they should be speaking. “Hearing is the basis for speaking, and hearing abnormalities can affect the development of language function. The best time to intervene is at the earliest. Children’s speech is a long-term developmental process, and many parents lack the knowledge that hearing impairment can affect language skills. Children’s language skills begin with hearing and imitation, and hearing is essential for children to learn to use language to express and communicate from their teeth. Many children are not screened at birth and may miss the best time to intervene before the age of 3. Many of these children have moderate to severe hearing loss. Hearing impairment has a great impact on children’s development. The cognition of things around us depends on the joint cooperation of the five senses of sight, hearing, smell, touch and taste, which leads to hearing impairment has a great impact on children’s growth and development. The first is in language. 1-3 years old is a critical period for children to develop language skills, if children can’t hear or can’t hear well, the lack of sound and language stimulation will affect their future language development. Once hearing impairment is not detected and intervened in a timely manner, it can further affect other aspects of the child’s ability, such as dyslexia, communication disorders and may even lead to a child’s withdrawn personality, causing emotional and psychological problems. Hearing abnormalities, even if minor, can have extremely far-reaching effects on a child’s life, not only as a health problem for the child, but also as a social problem. Hearing disorders in children can achieve good rehabilitation results as long as they are detected, diagnosed and intervened early. Thus, to remind parents, after the birth of the baby must do newborn hearing screening, as long as timely intervention, the child’s hearing, language, cognitive and other abilities are very likely to return to normal levels, will not affect the child’s schooling and integration into society.