With the blue-white screening method,11 phosphate accumulating organisms (PAOs) have been screened from the sediment of Taihu Lake and screened a high-efficiency phosphorus-accumulating organism named G19.Individual bacterium modality, physiological and chemical characters primarily indicated that it belong to Listeria spp. The strain has a high phosphorus removal capacity, the approximate growth condition of the strain at 25℃in wastewater synthetic medium. At last, practical application of the strain in the treatment showed that the removal rates were respectively over 75.8% ,which concentration of TP decreased from 0.33mg/L to 7.9 mg /L.Using the annular flume ,it was investigated that the removal of TP in main flow area and the recirculation zone are different.The results show that the higher the turbulent intensity,the better removal of TP. The result is great value for sewage treatment and eutrophication control.