Abstract: Short-staple polyester filter cloth was utilized as the separation medium to develop a submerged dynamic membrane bioreactor (DMBR). The treatment efficiency and operation characteristics of DMBR were studied. Results showed that the removal efficiency of the DMBR for average COD，NH4+-N and total nitrogen were 89.00%，82.50% and 44.85%，respectively，and the effluent turbidity was about 1NTU. The outflow water quality was better than the first grade A required by the discharge standard of pollutants for municipal wastewater treatment plant，and the treated water can be used for town landscape. Analysis in variation of filtration pressure and flux showed that the dynamic membrane could be formed within 10 h with a flux of 37.9L·m－2·h－1，and its backwashing period was about 30 h.