Abstract: During the construction of hydropower project, slope instability will affect the construction safety and progress. In order to ensure the long-term security and stability of high steep slope, it is necessary to take reasonable construction measures for its comprehensive treatment. For the engineering characteristics of the Changheba hydropower's high steep environmental slope: the complex geological conditions, the decentralized management areas and the more fractured and jointed rock mass fissure development, the slope problems of the different depth can take the corresponding control measures by using of unique material transport and construction channel. Aiming at the slope covering and dangerous rock mass, the supporting technologies are often clearing the slope slag, active and passive protective net, retaining wall and anchor tendon bundle and so on; Aiming at the slope shallow support aiming at the slope surface stability problem, the used supporting means are anchor spray concrete, frame Beams, anchor and others; Aiming at the broken rock mass of the slope deep layer, consolidation grouting and anchor cable technique can be used to deep supporting. The long-term field monitoring data shows that the high steep environment slope is stable and safe after comprehensive treatment.