Drawing on the coupling theory，this study takes the senior care facilities in China from 2017 to 2023 as the research object. The entropy method and the coupling coordination degree model are used to analyze the spatial - temporal evolution characteristics of the supply and demand for senior care facilities in China. The results show that both the comprehensive evaluation index of supply and demand of senior care facilities in all provinces have been steadily increasing，yet with an obvious trend of regional differentiation. The coupling degree between supply and demand of senior care facilities in most provinces has reached a high level coupling，indicating a strong correlation between the supply and demand systems. However，the coupling coordination degree between supply and demand still remains at a relatively low coupling coordination level. The spatial -temporal evolution of the coupling coordination degree of senior care facilities is evident，showing an overall decreasing spatial distribution pattern from the eastern region to the inland area. Based on this， governments should allocate and plan senior care facilities reasonably. All regions should formulate development strategies for senior care facilities tailored to local socio - economic characteristics and the demographic characteristics of older adults，so as to promote the coordinated coupling development of supply and demand for senior care facilities.