The reason why sichuan-tibet railway can't publicize.

Its special geographical environment and construction difficulty. The construction site of sichuan-tibet railway is located in the Qinghai-Tibet Plateau, and the terrain, geology and climate conditions are very complicated. The elevation of the line is between 2680-4300m, which fluctuates repeatedly, resulting in huge tunnel slag output and fragile ecological environment. In order to protect the ecological environment and reduce ecological damage, the construction of sichuan-tibet railway needs to strictly abide by environmental protection laws and regulations and take a series of measures to slow down and restore ecological impact.

The construction of sichuan-tibet railway is extremely difficult. According to Lu Chunfang, a member of the Chinese People's Political Consultative Conference and an academician of China Academy of Engineering, the construction of sichuan-tibet railway is even more difficult than the Qinghai-Tibet Railway. The most difficult section is under investigation and design. The investigation has been completed and additional information is needed. The intelligent third-line work also needs the design of engineering measures, which is expected to be completed before the end of the year.