With the rapid development of Internet of Things (IoT) technology, a lot of fitness equipment has been intelligentized. The article will analyze the existing home fitness products and their related technologies and functions from the perspective of "Internet of Things", taking parent-child interaction as the entry point of the design research. Through the research of school-age children and their parents, we summarize the current situation and needs of this user group for home parent-child interactive fitness products, as well as give the design positioning for the shortcomings of the existing products. Finally, it proposes the development direction of the future design of home parent-child interactive fitness products under the Internet of Things (IoT) technology, and puts forward the corresponding suggestions for the subsequent design of home parent-child interactive fitness products, which lays the foundation for the future design.