The Qinghai–Tibet railway, called Qinghai–Xizang railway or Qingzang railway.

The length of the railway is 1956 km (1215 mi), which connects Xizang (Tibet) to other Chinese province. Its elevating terrain, harsh natual conditions and environmental protection demands made it the most difficult railway to build in China. Test-running of the line started on 1 May 2006 and now the passenger trains run from Beijing, Chengdu,Chongging,Guangzhou.

The line includes the Tanggula Pass, which, at 5,072 m (16,640 feet) above sea level, is the world's highest railway, and Tanggula railway station at 5,068 m (16,627 feet) 33°00′18.50〃N 91°38′57.70〃E is the world's highest railway station. 1,338-m Fenghuoshan tunnel is the highest rail tunnel in the world at 4,905 m above sea level. The 4,010-m Guanjiao tunnel is the longest tunnel between Xining and Golmod and 3,345-m Yangbajing tunnel is the longest tunnel between Golmod and Lhasa. More than 960 km, over 80% of the Golmod-Lhasa section, is at an elevation of more than 4,000 m. There are 675 bridges, totalling 159.88 km, and about 550 km is laid on permafrost.

Future extention will reach to Nepal and India, also it is planed to add six more rail lines to the Qinghai-Xizang railway, a network will form in the next decade.