Abstract: Prevention of cable crane collision accidents in high arch dam construction is of great significance. This paper expounds the relation between the cable cranes’ movement and collision preventing measures based on an explanation of the characteristics of cable cranes’ structure, operating mode, and working environment. To meet the location monitor demand in cable crane construction, we conduct an experimental study on the accuracy in crane positioning and the anti-occluding measures, and design an integrated positioning system that combines the GPS and UWB positioning technologies. Then, based on the positioning data, a collision detecting method and a distance and time warning model are developed. Finally, we verify the applicability and reliability of this anti-collision system using model tests, and show that the system is successful in detecting possible collision accidents and issuing timely warnings in cable crane construction.