In this paper,the forms of Zn,Cd,Pb and Cu in water from the Changjiang source to the estuary area were determined by ASV method.The main results are as follows:(a) The total contents (Ct)of Zn,Pb,Cu and Cd in the source were 4.0,1. 88,1. 28 and 0. 07μg/L respectively,while Ct were in the ordet of Zn(20.1μg/L)>Cu (14. 9 μg/L) > Pb (6.73 μg/L)>Cd(0.15 μg/L)in mainstream and Zn (93.6μg/L)>Cu (7. 71 μg/L)>Pb(5. 65 μg/L) in the estuary area.However most of them were presented as Mp. Their dissolved contents (Cs)were in lower levels of Zn(1.4 μg/L)>Cu(1.3 μg/L)>Pb(0. 11 μg/L)>Cd (0. 012 μg/L).(b) The distribution of soluble forms is related to the type of metal and to the environmental variables. From source to the mainstream, the major form of Zn from MALi converted into MAb, Cd resembles Zn in forms of distribution,Pb,mainly existed as MAb.Cu,as MLb. But in the estuary area,the major forms of Cd and Pb were all MAb, then MALi varied with salinity of water.