The green ecological protection of high and steep rock slopes has always been a difficult point in slope engineering. In the slope protection project of K51 section of Chengya Expressway, the author designed a set of green ecological protection systems suitable for this high and steep rock slope based on accurate analysis of the geological environment of the slope engineering. This system achieves a harmonious unity between disaster prevention and environmental protection through the organic combination of green vegetation and light engineering measures, achieving good ecological effects. The ecological protection project for high and steep rock slopes has been rated as a model project for slope protection by the Sichuan Provincial Department of Transportation. After nearly 3 years of operation, it has become an economic, practical, safe, and reliable demonstration project for green ecological slopes