The holocene sand bodies in Changjiang delta area may be classified genetically as river mouth sand, marine sand and river channel-filled sand, which are different in external geometry, internal characteristics, spatial distribution and contact with overlying and underlying beds, The sand bodies ate distributed in two-storeyed beds in vertical sequence. The transgressive sands are overlain by regressive ones, and there is a wedge of marine clay between them. The holocene sand bodies in Changjiang delta area may be classified genetically as river mouth sand, marine sand and river channel-filled sand, which are different in external geometry, internal characteristics, spatial distribution and contact with overlying and underlying beds, The sand bodies ate distributed in two-storeyed beds in vertical sequence. The transgressive sands are overlain by regressive ones, and there is a wedge of marine clay between them.