Abstract: The paper reports the distribution and source of ~(210)Pb in the sediments of Xiamen Sea Region The horizontal distributions of ~(210)Pb in the sediments are non-uniform. ~(210)Pb content increases gradually by the ordinal of Jiulong River Estuary(include outside Xiamen Harbor), West Xiamen Harbor and Dongzui Harbor. It is shown that the source of ~(210)Pb in the sediments of Xiamen Sea Region is not from seashore, but from marine.