Skeletal class Ⅱ malocclusion is one of the common dentomaxillary deformities in children, mainly caused by uncoordinated development of the maxilla and mandible, which seriously affects facial aesthetics and occlusal function. The mixed dentition period is a critical stage for maxillofacial growth and development, and early intervention is expected to improve jaw relationships, reduce the risk of anterior tooth trauma, and lay a foundation for treatment in the permanent dentition period. This paper systematically reviews three commonly used treatment methods in the mixed dentition period (functional appliances, cervical headgear, rapid palatal expanders) as well as their correction effects, stability and indications, and discusses the differences in effects between early and late treatment and strategies for selecting treatment timing, aiming to provide certain reference for clinical practice.