Abstract: The rmle of the East Asian monsoon(EAM)in responses of the sea surface height(SSH)in the EastChina Sea and its adjacent seas(ECS)to the East Asian climatic jumpwas investigated using the oceanic and at-mospheric reanalysis datasets such as Simple Ocean Data Assimilation(SODA),Common Ocean-ice Reference Ex-periments(CORE),China Ocean Re-Analysis(CORA)and the Regional Ocean Modeling System(ROMS).Theresults indicate that while the EAM weakens after the climatic jump aound 1976/1977,the oceanic ciculation re-sponses greatly with an obvious change in SSH in the ECS.In summer,2 anomalous anti-cyclomic oceanic curentswere formed in the south of Yellow Sea,and 3 anomalous cyclonic oceaniccurrents in the ECS and the adjacent wa-ters of Jeju Island with increased westwand branch of Yellow Sea warm current,and decreased southem Yellow Seacoastal curent,andweakening of East China Seacoastal and offshore curents,which tended to induce an obvious-ly positive SSH anomaly arises in thevicinity of the Changjiang Estuary,Hangzhou Bay and in the south of theYellow Sea.In winter,anomalous cyclomic and anti-cyclonic oceanic curents appeared in the south ofYellow Seaand the adjacent of Changjiang riverdischarge and the areas of Jeju Island,going with the weakeningof the south-ern Yellow Sea coastal curent and the enhancing of Taiwan warm current,which favored an obviously positive SSHanomaly arises in the Yellow Sea and Bohai Sea.It is therefore suggested that the EAM variation is very likely toplaya great role in the changes ofthe sea surface height in the ECS and its adjacent waters.