Abstract: Taking the coastal beach area around Yancheng, Jiangsu province with relatively complex ecosystem as the research object, based on three typical areas, this paper uses 7 time series remote sensing image data from 1994 to 2018, interprets land use type data, and measures the ecosystem service value of the research area. The results show that: (1) The results show that from 1994 to 2018, the land use types and areas in the study area generally showed a trend of “two increases, four decreases and one stability”, that is, the foundation pond and construction land increased, the agricultural land, grass beach, salt field and mudflat decreased, and the river area was basically stable. (2) The total value of ecosystem services (ESV) in the study area showed an overall growth trend, It have increased 2.029 billion from 1994 to 2018. Among them, the ESV in the distribution area of tidal wetlands and the urban-rural fringe area decreased most significantly. (3) The sensitivity analysis results show that the sensitivity index of each ecosystem type is less than 1, indicating that each coefficient has a small impact on ESV.