The application of canal reactor with bio-membrane to sewage treatment was studied in this paper.This method combined the advantage of activated sludge process and biomembrane process,which could dispose the municipal sewage efficiently without secondary sedimentation tank in the device.The concentration of COD_Cr and NH₃-N were measured in experiment,meanwhile,the effect of different HRT and influent loads on removal efficiency was analyzed.The results showed that the removal efficiency of COD_Cr and NH₃-N increased with the increasing HRT,and decreased with the increasing influent loads under certain experiment condition.The removal efficiency of pollutants was relatively high(COD_Cr 71%,NH₃-N 36%) when COD_Cr and NH₃-N concentration were 100 mg·L^-1 and 15 mg·L^-1 respectively,while water temperature was 25℃ and the flow was 0.6 L·min^-1.Under this situation,the effluent was more satisfactory,which could reach the water standard of view,amusement,cooling water and so on.