In regular dance teaching, teachers find it difficult to pay attention to and meet the specific needs of each student. Extended-reality (XR) has the potential to help students get more information to dance learning. This study developed an XR interactive learning system to assist teachers in dance teaching, and explored the impact of XR on the process and results of dance skills. To assess the effectiveness of XR in dance education, a quasi-experiment was designed. Students majoring in preschool education in vocational high school in Hangzhou, China were recruited as research participants. 54 female students were divided into two groups with the same teaching pace, each with 27 students. The experimental group was taught dance lessons using a developed XR interactive learning system, while the control group was taught dance lessons using traditional methods. The experiment lasted for eight weeks and consisted of 16 lessons. Finally, the results indicate that XR has the potential to improve students' learning performance and facilitate learning interactions in dance learning; to provide real-time personalized feedback to students and improve autonomous learning. Moreover, XR has the potential to enhance learning experience by reducing the cognitive load of students in dance learning. The results of this study is expected to help those considering the use of XR to supplement dance instruction.