Abstract: Sandy coastline is unstable and its dynamic changes are highlighted.Carrying out the dynamic monitoring of sandy coastline to analyze its features and incentives,plays an important role in sandy coastline protection and development.Based on landsat images of 1987,2000 and 2014,this paper analyzed the study of sandy coastline changes in Tangshan.The results show that:(1) Influenced by the sediment reduction and ocean dynamic,sandy coastline overall was eroded from 1987 to 2000,especially the strongest erosion of the arc-shaped coast in Luanhe Estuary-Langwo Estuary.(2) After 2000,due to artificial construction and artificial coast increased,the erosion rate of sandy coastline was slowing down.With the strengthening of human intervention,the trend of coastline evolution will be more complex.This paper puts forward some reasonable measures to prevent sandy coastal erosion,such as returning aquaculture ponds to wet land and beach nourishment.