Abstract:  The development, utilization and protection of the potential land resources of the radial sand ridges are important for the Jiangsu coast. This article based on topographic data of tidal flats, considering geomorphology situation of radial sand ridges, focused on acquiring the amount and distribution of potential land resources under different development intensity with different reclaimed elevation. Using multi-temporal remote sensing images in low tide, stability of potential land resources was analyzed by calculating outcropping repetition rate of tidal flats. Appropriate scale reclamation and layout of Tiaozini-Gaoni-Dongsha as the main zone of radial sand ridges was illustrated from the land demand and different reclaimed elevation. The results showed that: (1) potentially land resources was huge and the area is from 1552 to 6827km2, which contained 480 to 4141 km2 in sandbar according to different reclaimed elevations; (2) on the basis of stable level analysis during 40 years(1973~2011)and 10 years(2005~2014), the area of Tiaozini and Gaoni above 0 meter (theoretical) respectively are 605.65 km2 and 762.77 km2 (the stable area is distribute on interior of sand ridges, the secondary stable area around the key stable area and was eroded by repeated tidal creeks, and the peripheral area is instability region which is less exposed); and (3) the most appropriate reclaimed elevation interval is between 0 m (the Old Yellow River Datum) and the 0m (Chart Datum). In this case, a large space can be silted conserved. The stable zone above the 0m (the Old Yellow River Datum) should be the priority in the reclamation planning.