Abstract: The segment from Haizishan to Zhoubalong in national highway 318 lies in the borderline of the western part of Sichuan province and Tibet Because of the extensive effect of Indian Plate movement,earthquakes often take place in this segment,which results in frequent geological disasters and affects goods transportation of Tibet and local economic development By remote sensing survey and analysis,the characteristics of these disasters are found Then,after such elements as geological background,geological disasters,environment,and economic are overall appraised,the optimal highway line is chosen.