The ecological green integration demonstration area of the Yangtze River Delta is located at the junction of Jiangsu Province, Zhejiang Province and Shanghai City, which plays an important role in the integration process of the Yangtze River Delta. In order to explore the land cover change and its driving forces in the demonstration area since 2008, the local climate zone classification system and random forest classification method are adopted. Based on Landsat-5 TM optical images and dual polarization PALSAR data in 2008，the land cover of the demonstration area in 2008 is classified. Sentinel-2 MSI multispectral optical images and dual polarization PALSAR data are used to classify the land cover of the demonstration area in 2020.The results show that from 2008 to 2020, the construction land area of the demonstration area increases significantly. Among them, the increase of open high-rise buildings is the most obvious, from 12.23 km² in 2008 to 361.26 km² in 2020.The area of low vegetation decreases greatly, from 535.92 km² in 2008 to 197.26 km² in 2020.Lush trees, shrubs and undergrowth have also been reduced. The main driving factors of land cover change are urban expansion, shanty town reconstruction, population growth and industrial structure optimization. A reference for the study of land cover change in suburban areas in the process of urbanization is provided in this paper. In addition, a decision-making basis for promoting the construction of ecological green integration demonstration area in the Yangtze River Delta and the integration of Yangtze River Delta is provided.