The Shanghai–Hangzhou high-speed railway, also known as the Huhang high-speed railway or Huhang passenger railway is a high-speed rail line in China between Shanghai and Hangzhou, Zhejiang. The line is 202 km (126 mi) in length and designed for commercial train service at 350 km/h (215 mph). It was built in 20 months and opened on October 26, 2010. The line shortened travel time between the two cities from 78 to 45 minutes. The line is also used by trains departing Shanghai's terminals for Nanchang, Changsha, Guiyang, and Kunming making it part of the Shanghai–Kunming High-Speed Railway. It has made the proposed Shanghai–Hangzhou Maglev Line unlikely.

The high-speed rail (HSR) network in the People's Republic of China (PRC) is the world's longest and most extensively used – with a total length of 45,000 kilometres (28,000 mi) by the end of 2023. The HSR network encompasses newly built rail lines with a design speed of 200–380 km/h (120–240 mph). China's HSR accounts for two-thirds of the world's total high-speed railway networks. Almost all HSR trains, track and service are owned and operated by the China Railway Corporation under the brand China Railway High-speed (CRH).