According to Yilou granite residual soil coarse particle content,easy disintegration in water,easy to form the characteristics of slope surface erosion,The residual soil slope along the highway of Yilou was investigated,according to the degree of erosion division which obtained the law of develop-ment of splash erosion,rill erosion,Shallow gully erosion,gully erosion and collapse,According to the situation of early constructed slope that has been partial destructed,that the granite residual soil slope or filling shall be carried out in a timely manner after the protection of slope excavation,especially before the rainy season the granite residual soil embankment slope protection work,should be completed.Otherwise it will form a vicious circle.In order to more reasonable protect the granite residual soil slope,The gran-ite residual soil slope have been built in Nanyue highway was investigated.Combined with the research situation and methods of ecological slope protection,some suggestions are put forward for the selection of slope protection and grass irrigation for the residual soil slope of Yilou and provide a reference for engi-neering.%针对湖南省益娄高速公路花岗岩残积土粗颗粒含量多，遇水易崩解，极易形成坡面冲蚀的特点，对益娄高速公路沿线残积土边坡进行调研，将坡面按冲蚀程度进行划分，得出其发展规律为溅蚀→细沟冲蚀→浅沟冲蚀→冲沟冲蚀→坍塌，通过前期已施工边坡的局部破坏情况可知花岗岩残积土边坡开挖或填筑后应及时进行防护，特别是雨季之前应完成花岗岩残积土填筑边坡的防护工作，否则将形成恶性循环。为合理确定益娄高速花岗岩残积土边坡防护方法，对已建成的南岳高速公路花岗岩残积土边坡进行调查，结合调研情况与生态边坡防护方法，对益娄花岗岩残积土边坡防护方法与草灌选择提出了相关建议，以供工程参考。
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