With the acceleration of urbanization in China, the population of migrant children is expanding, and their social-emotional development has become a focal point of attention. This paper first reviews the definitions of migrant children and social-emotional competence to clarify the connotation of social-emotional competence in migrant children. It then analyzes the influencing factors, covering individual, family, and school aspects, such as gender, age, parenting styles of parents, and school resources. Next, it discusses the current state of intervention research both domestically and internationally, noting that international research started earlier and is more diverse in methods, while domestic research has been gradually developing with explorations tailored to local contexts. Finally, it proposes intervention recommendations, suggesting the adoption of foreign models to construct a localized assessment system and integrating resources from schools, families, and communities for intervention. The aim is to promote research development, enhance the social-emotional competence of migrant children, and support their comprehensive development.