The highway is the main carrier of national economic development, and slope stability evaluation and treatment along the road will be the key work for a long time. Based on the treatment of six hazardous rock bodies in Section K3+500~K4+720 over the national highway G108 in the Beijing Fangshan district, this paper conducts study on the stability evaluation method and treatment measures for rock slopes. The study is focused on the stability assessment of the slope and the selection of the effective treatment measures.