Abstract: The classification results of soft soils in Jiangsu Province are derived through the CPTU data. The soil classification methods based on the CPTU data are reiviewed, then the SBT (soil behavior type) method and the I_c (soil index) method are chosen to identify the soft soils in Jiangsu province, including Northern Jiangsu marine clay, Lixiahe lagoon clay, Yangtze Delta alluvial clay and Taihu alluvial clay. The soil classification results show that the CPTU data can be used to effectively recognize the typical soft soils in Jiangsu province, and the SBT results are consistent with Ic results. Morever, the boundary between different soil types is more obvious in Ic soil classification chart.