Bai Xiaoyun (born 15 June 1973), is a retired Chinese sprinter who specialized in the 400 metres.
She is the current Asian record holder in the 4 x 400 metres relay in a time of 3:24.28 seconds, achieved in September 1993 in Beijing with Cao Chunying, An Xiaohong and Ma Yuqin.
| Representing | |||||
|---|---|---|---|---|---|
| 1992 | World Junior Championships | Seoul, Korea | 8th | 400 m | 54.30 |
| 1993 | Chinese National Games | Beijing, China | 6th | 400 m | 52.07 |
| 1st | 4 x 400 m | 3:24.28 | |||