Abstract: To scientifically and accurately assess the ecological quality and facilitate regional ecological conservation and restoration,taking Jiangsu as the research area,using multi-source data including satellite remote sensing and biodiversity surveys,this study applied the Trial Measures for Regional Eco-environmental Quality Evaluation to evaluate the ecological quality of Jiangsu Province from 2020 to 2024.Trends and driving factors were analyzed across four dimensions:ecological pattern,ecological function,biodiversity,and ecological stress.The results showed that:① From 2020 to 2024,the Ecological Quality Index (EQI) of Jiangsu Province maintained "Class II",with an annual change range of "basically stable".Constrained by factors such as a low proportion of natural ecosystem coverage and a high intensity of territorial space development,the ecological pattern indicators and ecological stress indicators of Jiangsu Province need to be optimized.②Provincial ecological dynamics were driven by multiple interacting factors,including construction land expansion,ecological land reduction,urban park green space increase,biodiversity index improvement,and interannual vegetation coverage fluctuation.③Stabilizing the ecological pattern and ecological stress,and improving ecological functions and biodiversity are the keys to further stabilizing and enhancing the ecological quality of Jiangsu Province.