Abstract：Research purposes: This paper comprehensively analyzes and studies the geological conditions of the Daba mountain area in the research range for the Xi＇an － Chengdu Passenger Dedicated Line to define the railway alignment in the area with the better geological condition．
Research conclusions: The summariy was made on the characteristics of geological conditions in Daba mountainous area ，a number of the optionalconstruction plans of the Xian － Chengdu Passenger Dedicated Line were proposed，and the basic ideas and principles of the railway alignment were offered． The comparative analysis of the different construction plans in geological conditions showed the CK Plan was better than the others in hydrogeological conditions and engineering geology conditions．
景积仓， 巨小强. 西安至成都客运专线西安至陕川界段大巴山区地质选线[J]. 铁道工程学报, 2011, 28(2): 16-20.
JING Ji － chang，JU Xiao － qiang. Railway Alignment in Section between Xi＇an and Shanchuan of Xi＇an － Chengdu Passenger Dedicated Line in Daba Mountain Area. 铁道工程学报, 2011, 28(2): 16-20.
Du Yuben， Jiang Liangwen． Main Problems in Engineering Geology and Alignment in DaLi － baoshan Section of DaLi － RuiLi Railway ［J］． Journal of Railway Engineering Society，2010( 4) : 23 － 28．
2011, Vol. 28 
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