Abstract: Aiming at the problems of difficulty and high risk in the construction of landslide remediation project of Lianghekou Hydropower Station in Baoxing County after Lushan M7.0 strong earthquake,a set of key technologies for construction of cliff-type dangerous rock mass group are put forward, including cantilever scaffolding design, overhead cableway transportation design and hole grouting construction of fractured rock mass. The complete set of technology enables the timely renovation of dangerous rock mass on steep cliffs, wins precious time for post-disaster reconstruction, saves costs, and effectively protects the fragile ecological environment in earthquake-stricken areas. It also further enriches the theory and practice of prevention and control of dangerous rock mass, and provides a new way of construction and environmental protection for similar projects.