Abstract: Studies on the influence of water body eutrophication level on phosphorus releasing/absorption from sediments in Suzhou River were conducted under mimicked static state experiments. The results were given as follows: sediments from Suzhou River can absorb P in static state without external input; with the increasing of phosphate concentration, the phosphate adsorption capacity of sediment also has increased; the higher ratio of over-lying water to sediment it is, the lower phosphorus absorbing capacity on sediments will be.