NOVELTY - Treating sewage and recycling the sediment comprises: (a) connecting tap water or underground water (1) to a metal sheet treating pond (2) provided with a waterproof metal sheet (4); (b) introducing sewage into a sewage purifying pond (6) and purifying; and (c) utilizing the water purified in the purification pond by: pressurizing one part of water by a booster pump (3) and returning to the metal sheet treating pond, pressurizing one part of water by a booster pump and supplying to a drug pool for drug infusion, and refluxing the remaining water and storing.    USE - The method is useful for treating sewage and recycling sediment.    ADVANTAGE - The method: is convenient and feasible; has low investment and good effect; reduces the metal sheet cost; makes full use of water for production; saves water resources; and is favorable for environmental protection.    DETAILED DESCRIPTION - Treating sewage and recycling the sediment comprises: (a) connecting tap water or underground water to a metal sheet treating pond (2) provided with a waterproof metal sheet (4), processing and maintaining the waterproof metal sheet through a pipeline; (b) introducing the sewage after processing the waterproof metal sheet into a sewage purifying pond (6) through a pipeline and purifying the sewage in the sewage purifying pond; and (c) utilizing the water purified in the purification pond by: pressurizing one part of water by using a booster pump (3) through a purifying water pipe and returning to the metal sheet treating pond for treating water and maintaining the metal sheet, pressurizing one part of water by using a booster pump through a purifying water pipe and supplying to a drug pool (8) for drug infusion, and refluxing the remaining water and storing the water for cleaning the production line device and the field.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of treating sewage and recycling the sediment.    Metal sheet treating pond (2)    Booster pump (3)    Waterproof metal sheet (4)    Sewage purifying pond (6)    Drug pool (8)