Delayed language development is a condition in which a child’s ability to express himself or herself or understand language is significantly behind the normal developmental level of children of the same age due to various causes. Factors such as low intelligence, hearing impairment, organ disorders, central nervous system disorders, and poor language environment are all common causes of language delay in children. There are two clinical manifestations of language delay. 1, expressive language disorder: the child can understand the language, but he can not express the language, may be related to the surrounding environment, such as too little communication with the child, do not know how to organize the appropriate adult language to communicate with the child, such language development delay, after the practice, rehabilitation exercises (mainly for the organization of the language logic ability to rehabilitation exercises) parents must be accompanied, so that the prognosis is very good. The prognosis is very good, at the same time the child’s heart is basically not a big gap, after the exercise can reach the level of peers! 2, perceptual language disorder: the child’s ability to understand language and expression are limited, may be related to brain development problems, genetic and metabolic system diseases and mental retardation are certain, give the child a cranial magnetic resonance examination, electroencephalography and intelligence assessment test, such a problem, you need to actively find the cause, with rehabilitation exercises, mainly to exercise the child’s understanding ability The earlier the treatment, the better the results. We must treat children with language delay early, because the best time for language development is between the ages of one and three.