The South Shore of Hangzhou Bay is one of the most changeful sections in China’s coastline since modern era. In previous studies, researchers have conducted much investigations using historical record, remote sensing data and land use planning in this region. Recently, our investigations in the area have discovered wave- cut cliffs, grooves and caves near two isolated hills 2~3 km away from the coastline of Cixi City’s coastal plain, the Fulong Mount and the Haiwang Mount, which are direct geological and landscape evidence providing explicit indicative implications on location of historic coastline. Analysis suggests that these marine abrasion landforms are remains of former coastline in 1960s. Our discovery has important significance on shoreline variation studies and human influences on intertidal zone’s evolution, meanwhile, these wave- cut landscapes are also very valuable geological relics of historical shoreline of Hangzhou Bay that can serve well on popular science propaganda, study tours and geological tourism.