Abstract: Based on the survey of engineering geology and hydrogeological conditions, statistics of joints and fissures of Maerdang highway slope, the stability analysis of rock slope stability is carried out by the method of hemispherical projection method. The results show that the whole slope is stable. But if no protective measures are taken, after a long period of weathering and erosion of rock and soil, the slope will gradually be in less stable state. According to the climatic environment and the past experiences, this paper puts forward the ecological protective measures of slope protection with anchor pull type concrete retaining wall combined with flexible protective net, and the implementation effect is good.