Abstract: Under the concept of complete flow scheme in urban wastewater reclamation, several practicable processes of urban wastewater reclamation at present were analyzed and contrasted based on the mechanisms of two microbiological nitrogen removal processes of nitrification-denitrification and anammox. At last, a new concept of complete flow scheme in urban wastewater reclamation was put forward, which mainly removes the nitrogen via anaerobic ammonium oxidation process. The new complete flow scheme in urban wastewater reclamation was an energy efficient process of urban recycling, which not only optimized the removal of TOC, TN and TP in the respective units treatment processes, but also the nitrogen removal of the reject water in sludge digestion process and the wastewater in the secondary treatment processes according to the different water qualities and physical properties of nitrogen-containing wastewater.