Abstract: Investigating the long-term dynamic coastline evolution and its driving factors holds great significance for the protection, restoration, utilization, and sustainable development of coastlines. Based on the selected 1964-2024 remote sensing images of seven time phases from multiple sources, including the Keyhole, SPOT, and Sentinel 2 satellites, this study acquired coastline data of various periods of Shenzhen City using remote sensing indices and object-oriented methods. Accordingly, the spatiotemporal coastline variations in the city were explored in terms of quantity, structure, type distribution, end point rate (EPR), and underlying causes. The results indicate that over the past 60 years, the coastlines in Shenzhen increased by 42.26 km, with a growth rate of 18.26% and a total area of sea reclamation and enclosure determined at 98.68 km². Within the time span, the coastline evolution in Shenzhen experienced three stages: large-scale sea reclamation, coexistence of sea reclamation and enclosure, and constraint and restoration. The natural coastline retention rate remained at about 61% after a significant drop, while the development and utilization intensity gradually increased to about 40%. Spatially, western coastlines exhibited much more significant changes than eastern coastlines, with high coastline EPRs observed in areas including Ocean New City, Baoan Airport, Qianhai Bay, Nanshan Peninsula, Shenzhen Bay, and Yantian Port. Additionally, primary forces driving coastline changes in Shenzhen include artificially developed and macroeconomic policy regulation.