Abstract: Objective To explore the effects of music game on the social development of children's emotion.Methods The emotional and social development scale (CITSEA) was used to evaluate the children who went for treatment in Nantong women and children's health care hospital. Among the children, 36 children with abnormal emotional socialization development were randomly selected as the study subjects, and they were treated with music games. The emotional and social development of them was assessed again after 3 months. Result Through music game therapy, the implicit behavioral domain index of the social development of early childhood emotion was improved obviously (t=-0. 283, P<0. 05). The activity level/impulsivity, anxiety, and other dimensions were significantly improved (P<0. 05), and the difference was statistically significant before and after treatment.Conclusion Children have a positive and enjoyable emotional experience in music games. Music plays an active role in promoting the socialization of children's emotions.