By using a soil filter system to treat rural domestic sewage. The paper analyzed the change rules of space and time of CODCr, BOD5, NH3-N, TN and TP in the process of treatment. The result shows that removal efficiency from high to low is summer>autumn>spring>winter. The highest removal efficiencies of CODCr, BOD5, NH3-N, TN and TP in the process were 87.3%, 88.2%, 75.9%, 59.3% and 74.1% respectively. Within the soil filter system, the removal efficiency every substance increase with water flow direction. The concentrations of TN and TP in treated water are higher. These treated water that is used as irrigation can reduce the amount of fertilizer and save freshwater resources.