There are many reasons why boys speak late, including environmental and pathological reasons, and the pathological reasons include abnormal hearing and autism. 1. Environmental reasons: the child’s home has more language systems and more languages, which may cause confusion in receiving information, poor processing of information, and poor language output; or the parents do not create a suitable language environment for the baby, such as the children of migrant workers, who may be alone for a long time without a speaking environment, thus can lead to backwardness in language development. 2. Pathological reasons: when the child’s hearing is not normal, it can’t receive language information normally, can’t hear and can’t imitate, so it can be late to talk; autistic children are easy to be immersed in their own world, with poor social skills and no social will, it will also appear late to talk. Children with autism are easily immersed in their own world, have poor social skills and no social will, and can also be late speakers.