Diastrophism is most active and the environment 0is most friable in west China. Some road suffered diseases and have weak capabilities for preventing disasters. And debris.flevvs, landslides and avalanches frequently occur, and obstruct the roads. Some regional special earth caused some diseases on roads, such as frozen earth, desert, loess,etc. During western China developing, Some geological problems are confronted, and should be attached important to roading. This paper discussed some questions on highway construction in western, such as routing based on geological conditions, disaster controlling, and environmental protecting, etc.