Huangpu River is a tidal river,it is also a major flood waterway of Taihu Basin.As a result of sea level rising,Yangtze Estuary and Huangpu River regulation,the flood-control projects in Taihu Basin being bring to effect,etc,the consistency of the tidal level data serial in Huangpu River is challenged,it is difficult to analyze the frequency characteristics with common method directly using tidal level measurements.In this paper,the combination frequency method is used to analyze the frequency characteristics of yearly maximum tidal level in Huangpu River,and the result is turned out to be valuable.