It is important to enhance soil body erosion resistance and stability in the lithoid slope ecological protection. This paper proposes the designed principle and concrete construction of soil protecting wing technics. This technics was tested at Qingfeng ecological protection project，the result shows that the rock slope using soil protecting wing techniques restored more quickly，soil body erosion evidently decreased and the soil body can add 4 to 7 cm thickness more than that of not using soil protecting wing technic. So，the soil's pro- tecting wing technics has a great value of extension and application.