400m Girls Heats, Heat:1 of 4 ; Official result since 19:03
First + 4 fastest to Final
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 8 | 411 | Chung Chao-yen | 57.53 | Taoyuan City | 59.26 | Q | ||
| 2 | 3 | 315 | Simova Veronika | 61.13 | Brno | 60.69 | q | ||
| 3 | 4 | 302 | Pollard Jemma | 01:02.0 | Lake Macquarie | 62.67 | B | ||
| 4 | 7 | 364 | Rychlewska Emilia Marta | 1:01.38 | Plock | 63.01 | B | ||
| 5 | 2 | 374 | Voronina Polina | Ufa | 1:04.98 | ||||
| 6 | 6 | 373 | Yurmasheva Darina | Ufa | 1:06.48 | ||||
| 7 | 5 | 416 | Klinhom Thipkesorn | 1:03 | Bangkok | 1:07.09 |