The Zhejiang-Fujian mud area has been the sink of sediments since the formation of Holocene high sea level.Under the influence of the East Asian monsoon,the variation of Zhejiang- Fujian Coastal Current and Taiwan Warm Current is characterized by seasonality,the sediment transport patterntrapped in summer and transported in winterin the Yangtze River mouth plays a key role in the formation of the East China Sea inner-shelf mud area.The potential sources of the Zhejiang- Fujian mud area are the Yangtze River,Zhejiang-Fujian rivers and western Taiwan mountain rivers,and the Yangtze River materials are the main source.Through the analysis on clay minerals,rare earth elements,Sr Nd isotopes and environmental magnetism,the Yangtze River is dominated by illite, followed by kaolinite and chlorite,with less smectite.In the rivers of western Taiwan,illite and chlorite are the main clay materials,with no smectite.Pyrrhotite is a unique magnetic mineral of Taiwan river sediments,and can be used as an indicator of the source identification of sediments from rivers in mainland or Taiwan.The mud area is located in the East Asian monsoon region.Under the combined influence of the tropical processes in the low latitude and high latitude atmospheric circulation,the climate change is fluctuating.The changes in the East Asian Winter Monsoon (EAWM)reflected in sediment-sensitive grain size only record the climate changes since the formation of the muddy area,and cannot represent the entire Holocene.Influenced by the Taiwan Warm Current and Zhejiang-Fujian Coastal Current,the sensitive grain size needs to be further studied as an indicator of EAWM evolution.