A multi-loop reactor is constructed based on analysis of temporal and spatial character of several continuous current nitrogen and phosphorus removal process in this paper.Through cross experiment design,the important factors to influence the effect of the nitrogen and phosphorus removing under low carbon-resource condition were found,and the feasible control parameters of the biological nitrogen and phosphorus removal process under low carbon-resource condition were put forward.The results are valuable for design and operation of wastewater treatment process with similar conditions.