Three sewage treatment groups were set as microorganism group (Ⅰ) , plant group (Ⅱ) and plant synergistic with microorganism group (Ⅲ) .The concentrations of total nitrogen ( TN) , total phosphorus (TP) and chemical oxygen demand ( COD) were detected on the 4th, 8th, 12th and 16th day after treat-ments .The data were treated by SPSS .The results showed that the three treatment groups all reduced the con-centrations of TN , TP and COD significantly , which indicated that they all had good effects on treating sew-age .The group of plant synergistic with microorganism had the best effect .It could decrease the concentration of TN from 21.5607 mg/L to 5.2704 mg/L, TP from 6.1695 mg/L to 0.8279 mg/L and COD from 215.3 mg/L to 52.8 mg/L.%试验设3个污水处理组，第Ⅰ组为微生物处理组、第Ⅱ组为植物处理组、第Ⅲ组为植物微生物协同处理组，分别在处理4、8、12、16 d时取样测量样品中总氮（ TN）、总磷（ TP）、化学需氧量（ COD）浓度；采用SPSS进行数据处理。结果显示，3个处理组都使污水中TN、TP、COD浓度显著降低，表明3种处理方法都具有很好的污水处理效果。其中第Ⅲ组处理效果最好，处理16 d，使污水中TN浓度从21．5607 mg／L降低到5．2704 mg／L，TP浓度从6．1695 mg／L降低到0．8279 mg／L，COD浓度从215．3 mg／L降低到52．8 mg／L。
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