Asphalt concrete core wall is an important structure of earth rock dam. The quality of raw materials such as aggregate and filler has a decisive influence on the impermeability, durability and deformation adaptability of the core wall. With Laluo water conservancy project in Rikaze city of Tibet Autonomous Region as an example, we compared two artificial aggregate quarries for the asphalt concrete through testing and inpection of multiple quality parameters. After comprehensive consideration of various factors, we selet Kagong limestone yard which is more distant yet boasts better rock quality as the material source to ensure the safety of asphalt concrete core dam in plateau, cold and high altitude areas. Moreover, we analyze and discusse some problems that should be paid attention to in the quality evaluation of raw materials of artificial aggregate for asphalt concrete, and put forward some suggestions to solve the problems for reference in the revision of relevant standards.