Abstract: With the strategies of "One Belt One Road" and "Global Energy Interconnection" structuring and implementing, more and more power transmission and transformation projects are built on the complicated geological conditions in mountainous areas. However, current studies on the identification, prediction and evaluation approaches of rock collapse(rockfall) for power transmission and transformation projects are few. Therefore, it is difficult to effectively solve the increased translations between frequent occurrence of rock collapse(rockfall) and safety of construction and operation of power transmission and transformation projects in mountainous areas. For this reason, we studied the approach of rock collapse(rockfall) identification and prediction for power transmission and transformation project in mountain area, using remote sensing, UAV aerial photogrammetry, rock mass structure analysis tool and rockfall simulation method. Following conclusions were obtained:(1)Based on the thinking and approach of engineering geological zoning on large area-remote sensing analysis on medium area-UAV aerial photogrammetry on mountain area-analysis of rock structure characteristics, dangerous rock mass that will lead to rock collapse(rockfall) in long and large region of power transmission and transformation project could be identified quickly and analyzed. (2)Three-dimensional numerical simulation method could be used to quickly identify the characteristics of rockfall's arriving to the tower(electric substation) or not, and the kinematic characteristics of rockfall that will arrive to the tower(electric substation) could be analyzed carefully by integrating different approaches.(3)Approach of rockfall risk analysis for power transmission and transformation project.