Xu Dongdong (Chinese: 徐冬冬; born 16 February 1990) is a Chinese actress and singer.

Xu first rose to prominence in 2016 for playing Shen Jiawen, a drug trafficker, in the television series Yu Zui, which attracted more than 100 million views on iQiyi within days of its premiere, making it one of the most popular TV series tailored for the online platform.