This paper presents the distribution characteristics of the phosphorus in the Haihe River estuary of Bahai Bay The contents of inorganic-P, organic-P and total-P were determined and discussed. The content of phosphorus in the estuary was higher than that in offshore waters; seanonal variation of the former was obvious, and the latter was equable. There were positive correlations between the content of phosphorus and that of the other factors of organic pollution in the estuary.