Abstract: For wastewater reuse in areas of the Bohai Bay, the effects of freezing temperature, pollutant concentration and mechanical stirring on the quality of sewage ice water, and the effects of artificial freezing on removal of COD_Cr and NH₃-N in domestic sewage in saline-alkali areas of the Bohai Bay, were studied by laboratory experimentation. The results showed that the artificial domestic sewage was perfectly purified by the freezing technology. At a temperature between -11 ℃ and -2 ℃, the removal efficiencies of COD_Cr and NH₃-N in the sewage ice water were above 80% and 85%, respectively. When the temperature became lower, the domestic sewage froze faster, and the removal efficiencies of COD_Cr and NH₃-N decreased as well. Additionally, the higher the concentration of pollutants in the sewage water, the worse the melting ice water quality was. Mechanical stirring did not affect the water quality significantly.