According to the introduction, Big railway east from Dali, west to the Sino-Burmese port Ruili, across the west of Yunnan province Cangshan, Gaoligong Shan and other mountains, across the Nu River, Lancang, ', etc., full length of about 331 kilometers, design speed of 140 km, is the national "All the Way" initiative in the Pan-Asian Railway (west) of the International Railway channel of the important components. The length of the Gaoligong Shan Tunnel is 34.538 km, is the first long railway tunnel in our country, for the big Railway Control project, the tunnel is of special geographical location, complicated geological conditions and extremely high construction difficulty.

It is understood that the China Railway Tunnel Bureau undertakes the construction task of 29.307 km of Gaoligong Shan Tunnel, of which the outlet is 14 km using 2 tunnel tunneling Machine (TBM) construction, at the same time set 1 inclined shaft and 2 shaft auxiliary construction. "Choi Wan No. 1th" has been in the construction of urban rail transit 6.6 kilometers, the China Railway Tunnel Bureau organizes the expert team to carry on the adaptation upgrading, strengthens the advance drilling and the detection system, enhances the support system, enhances the excavation speed, increases the top shield shrinkage, and increases the design of the double bed reducer to become the Gaoligong Shan tunnel. Tailored "construction tool. The tunneling Machine (TBM) will provide more professional and efficient support for the construction of Gaoligong Shan tunnel.

Up to now, Gaoligong Shan Tunnel No. 1th inclined shaft construction has exceeded 1000 meters, is expected to enter the positive hole in May 2019, 1th Shaft construction Breakthrough 500 meters, is expected to enter the hole in January 2018.