A 110 days'experiment was carried out to study a pilot-scale integrative A/O(anaerobic/ aerobic) MBR treating domestic wastewater from an university. Influent wastewater was stopped from day 51 to day 56 and the activated sludge was feeded by faecula and urea, and inlet was restarted on day 57. Chemical Oxygen Demand(COD)，Biochemical Oxygen Demand(BOD5)，Ammonia Nitrogen(NH+4N) and Total Phosphorus (TP) concentration was investigated in different part of the system. The average removal efficiency of COD,BOD5, ρ(NH+4-N),TP was 95.10%，90.96%，93.02% and 93.37%, respectively, mainly digested in anoxic tank. MLSS and SV in the aeroic tank increased gradually and stayed steadily on 8 600 mg/L and 85%, respectively. SVI was lower than 112.1 mg/L during the whole experiment. The value of MLVSS/MLSS, which reflects the sludge activity, descended slightly in 110 days'study, especially on the anaphase. The results shows a promising future for the application of this system for municipal wastewater reclamation.