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以生活污水为试验对象，通过投加不同种类及不同浓度的外加碳源研究了其对SBR法脱氮除磷效果的影响。结果表明：外加碳源能大大提高SBR法对氮、磷的去除率。投加葡萄糖、甲醇之后，总氮的去除率最高值分别为65．0％、56．0％，啤酒废水可使总氮去除率稳定的提高；投加外加碳源后，总磷去除效果啤酒废水最佳，其次是甲醇，再次是葡萄糖。同时啤酒废水来源广泛、价格低廉，因此啤酒废水是外加碳源的最佳选择。“,”The experiment in this article takes the beer wastewater as the experimental object, and through adding different type and different density external carbon sources, it studies the the influences on the remove of phosphorus and nitrogen according to the SBR law. The experimental results show that additional carbon sources can greatly increase the nitrogen and phosphorus removal efficiency of SBR method. The highest total nitrogen removal rates can reach 65.0% and 56.0% respectively after adding glucose and methanol,and beer wastewater can increase the total nitrogen removal rate stably. After adding additional carbon source,beer wastewater can reach the highest phosphorus removal rates, the following is methanol, and the last is re-glucose. Source of beer wastewater is extensive and the price is low,therefore,it is the best choice for being external carbon source.