2.5 years old baby recently suddenly stammering speech, consider with language development characteristics, learning others to speak, mental overstimulation, developmental stuttering related, 2 years old baby is just learning to speak stage stammering is a normal phenomenon. The main consideration is related to the developmental characteristics of the child’s language, as the child grows up this situation will be improved, try not to scold the child, otherwise it will lead to more and more children do not like to talk. In addition, it was found that the child stuttered, and said multiple groups of words, poor expression or stuttering around people, if the child often contact with such people, learning others to speak will also have stuttering phenomenon, parents should be patient and careful to teach the child, do not scold the child. If the child used to speak normally and this situation suddenly appears, it is mainly considered to be caused by developmental stuttering, which is relatively common and will not affect the child and can gradually improve.