Children who still do not speak at age two are usually considered to be abnormal in their presentation. Two-year-olds normally produce a bisyllabic vocabulary or have an increased vocabulary, can communicate in simple language, and can simply state their wishes. A child’s inability to speak at age two may be due to pathological factors such as central nervous system injury, cleft lip and palate, hearing impairment, and short tongue tie, all of which can lead to delayed language development. In addition, it can also be caused by genetic factors, such as mental retardation, congenital genetic metabolic disorders or chromosomal disorders. Non-pathological factors can also lead to this, such as over-care by parents, where the child’s needs are met without verbal communication, and a long-term lack of verbal stimulation, which can lead to the child’s reluctance to speak. It is recommended that parents take their children to the rehabilitation department or the child health department to have the cause diagnosed by a specialist after a systematic examination, and then to carry out targeted treatment and, if necessary, to do the corresponding rehabilitation training early.