Worldwide continental shelves have been investigated and shelf shoals are a kind of submarine geography commonly developed within continental shelf areas. Several known shoals have been developed within Chinese continual shelf. These shoals have set up a dynamic equilibrium system with present dynamic conditions, forming a modern tidal current deposit regime. However, the Nanbeiwei shoal on the shelf of the northern South China Sea is named continental shelf shoal, but its genesis is completely different from other continental shoals.  Based on the seismic data, this paper indicates that Nanwei, Beiwei,  and Huizhou shoals developed within the east and south shelves belong to structural landform, with each shelf corresponding to one underlying diaper.