***Shear Wave Speed of Shallow Seafloor Sediments in the Northern South China Sea and Their Correlations with Physical Parameters*** Authors: G.M. Kan, J.Q.Wang Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography,MNR Corresponding author:G.M. Kan Contact Information: kgming135@fio.org.cn No. 6 Xianxialing Road, Laoshan District, Qingdao 266061, China ***General Introduction*** This dataset contains data collected during the marine geology study for southern South China Sea at First Institute of Oceanography, as part of Guangming Kan's project (July 2018): doi:10.4121/uuid:c85bf2ed-9415-4975-9f68-bdbb59319bed It is being made public both to act as supplementary data for publications and in order for other researchers to use this data in their own work. This study was supported by the National Natural Science Foundation of China under contract No. 41676055, 41330965, and 41527809, the Opening Fund of Qingdao National Laboratory for Marine Science and Technology under contract No.QNLM2016ORP0209, the Taishan Scholar Project Funding under contract No. tspd20161007. ***Purpose of the test campaign*** The purpose of these experiments was to establish the relationship between shear wave speed and physical properties for seafloor sediments. ***Test equipment*** The shear wave speed were measured by the bender element system.The wet bulk density of samples was measured by using the ring knife method and the water content was measured by using the drying method. ***Description of the data in this data set*** data for table 5 and figure2: A for the porosity, B to H for the shear wave speed at different frequency. data for table 6 and figure4: A for the wet density, B to H for the shear wave speed at different frequency. data for table 7 and figure6: A for the water content, B to H for the shear wave speed at different frequency. data for table 8 and figure8: A for the Average grain size, B to H for the shear wave speed at different frequency.