Abstract: This thesis has probed the benefits of soil and water conservation by eight different treatments on sloping land orchard of red soil．The resuIts show that compared with bare soil(CK)，planting Bahia grass on level bench terrace wall is the most effective method to conserve water and soil．It reduces the average runoff coefficient by 89．7％ and the amount of soil erosion almost 100％ ．Other treatments also result in some positive effects．Furtherm ore，the physical and chem ical properties of soil with sod culture are improved respectively．