A membrane-coupled sequencing batch reactor (MSBR) was used for the advanced treatment of rural villagesewage which is very low C/N ratio. The effect of powdered activated carbon, aeration rate, and external organic materialloadings on the treatment efficiency and filtration performance were investigated in sequencing batch reactor, in which aflat-sheet type microfiltration membrane with a pore size of 0.4 μm was submerged. At the initial operation (within 54days) MLSS concentration, and the removal efficiencies of COD, T-N, and T-P were increased with the increase of C/Nratio. After 89 days the removal efficiencies of COD, T-N, and T-P were 97.1%, 75.0%, and 48.3%, respectively.Suspended solid-free effluent was obtained by membrane filtration. The T-P removal was relatively low because of dependingon the amount of excess sludge wasting. During the operation of MSBR with powdered activated carbon, the particlesize of the sludge reduced by the increase of collision frequency and mixing intensity.