Research methods: Through making analyses of the current conditions and traffic volume of Zhangjiakou area, the research and comparison are made for the programs of introducing Zhangjiakou-Dining Double Line and Beijing-Baotou Line to Kongjiazhuang Station in Zhangjiakou area.
Research results: The comments are made on the necessity of introducing Zhangjiakou-Dining Double Line to Zhangjiakou，the determinations are made for the program of station innovation, mode of track untwining and proposed program of introducing Zhangjiakou-Dining Double Line to Zhangjiakou, the research and analyses are made for the advantages and disadvantages of the program of Zhangjiakou-Dining Line going around Beijing-Baotou Line and the program of Zhangjiakou-Jiving Line crossing Beijing-Baotou Line in middle，and the recommendation is made to adopt the program of Zhangjiakou-Dining Line going around Beijing-Baotou Line.
Research conclusions: The operational modes of main stations in railway terminal and the local development plan should be taken into account when working out the untwining program，and the analyses should he made for the programs in order to obtain optiumu programs of station innovation and traffic untwing.
2007, Vol. 24 
