Research conclusions：In view of the role and effect to be played and made by this railway, the Baotou-Liuzhou Railway will become double-line railway at last with large traffic capacity. In order to give full play to the whole traffic capacity of this railway corridor, when upgrading this railway, the double-line from Baotou to Dabaodang in the north section should be built with the target speeds of 160 km/h and 200 km/h in future, the second line from Dabaodang to Yan'an in the middle section should be built with the target speed of at160 km/h, and the new double-line from Yan'an toXi'an in the south section should be built with target speeds of 160 km/h and 200 km/h in future. The existing line remain its original to form the three-line pattern. The early built-up double-line from Baotou to Xi'an will not only solve the problem of insufficient traffic capacity for outwardly transporting coal, but also solve the problem of the insufficient through traffic capacity. So this pattern accords with the general planning of Baotou-Liuzhou double-line with large traffic.