Shuidongdi (Chinese: 水洞底镇; pinyin: Shuǐdòngdǐ Zhèn) is a rural town in Louxing District of Loudi, Hunan, China.

It has an area of 89 km2 (34 sq mi)[1] with a population of 40,943 (as of 2010 census[2]).

The town was transferred from Lianyuan City to Louxing on January 24, 2017.

[4] The Luoyang–Zhanjiang Railway, from Luoyang City, Henan Province to Zhanjiang City, Guangdong Province runs through the town.

[4] The Shanghai–Kunming high-speed railway runs west-east through the southern town.