The four-year-old child’s speech is not clear may be speech delay, short tongue tie, cleft lip and palate, etc., daily to communicate with the child, train the child’s language ability, timely to the hospital for examination, if necessary, the corresponding treatment. 1. Delayed language development: In general, the four-year-old child’s language development is basically more complete, if the words are still not clear, it is considered to be delayed language development. Parents should teach their children to speak more, create a good language environment for them, encourage them to speak more, and accompany them to practice pronunciation, etc. to train their children’s language ability. 2. Short tongue tie: Patients will have difficulty in extending and rolling the tongue, which will affect eating and pronunciation. In some cases, the tongue tie will gradually relax, and there is room for self-improvement. In severe cases, if there is a situation that affects the tongue function, surgical treatment can be carried out, specifically including lingual ligamentotomy and lingual ligamentoplasty. 3. Cleft lip and palate: it is a common congenital developmental abnormality, which usually requires surgical treatment. The main focus is on the repair and functional reconstruction of cleft lip as well as cleft palate, which usually requires multiple surgeries. The four-year-old’s lack of clarity of speech may also be caused by other reasons, and it is recommended to consult a doctor in a timely manner.