The effects of the removal of the combined process device with anaerobic process, water-dropping aerating bio-contact oxidation process and aquatic-planted constructed wetlands on some kinds of contaminations were experimentally studied. The device was continuously monitored and the effects of the removal of the combined process on COD, TN and TP were analyzed according to the results. The average effluent concentrations of COD, TN and TP were 15.80mg/L, 5.51 mg/L and 0.34mg/L, respectively, meanwhile the influent concentrations were in the range of 51.20～211.12 mg/L, 28.29～122.12mg/L and 1.26～5.97mg/L，respectively. All these indexes were in accord with the pollutant discharging standard. The biological process presented the average removal ratios of COD, TN and TP while the operation period were 78%,85% and 50% , respectively , however the ecological process was necessary for the removal of TP. Finally, experiments demonstrated that the process could be applied to treat rural wastewater, and reduced the operation cost.