Based on the material flux and characteristic chemical component content in the suspended matter, the equation of the resuspension rate of the suspended mater is: αr: resuspension rate; CSA, CrA, CA are respectively the content of characteristic chemical component in the sea -born suspended matter, mixing suspended matter and sediment. The results showed that: (1)the resuspension rate is more than 96% in the bottom layer and more than 32% in the surface layer (2)the choice of the chemical component,A, is very important in the suspended matter in order to satisfy all three assumed conditions when the equation is used and the average standard deviation(?n-1) is less than 2.1%.(3)the resuspension rate in the suspended matter must be considered when calculating the material flux in the East China Sea.