The deposit features of Jiangsu marine soft soils was investigated based on Holocene epoch marine geomophology characteristics;the sediment history of Jiangsu marine soft soils is about 6000 years.The depth of embedment and thickness of soil layer of Jiangsu marine soft soils are of fluctuant varying because of effect of many times of transgressions and regressions.Through analysis and research of laboratory and field test data

Jiangsu marine soft soils are of features of high water content

high compression

high void ratio

high liquid limit

low bearing capacity and sensitive warp clay.Otherwise

we present some suggestion for ground improvement methods of design and construction.