| RankRk | Bib | Athlete | Mark | Record |
| 1 | 115 | Bahrain NASER Salwa | 50.09 | GR |
| 2 | 299 | India DAS Hima | 50.79 | |
| 3 | 497 | Kazakhstan MIKHINA E | 52.63 | |
| 4 | 310 | India NIRMLA | 52.96 | |
| 5 | 158 | China HUANG G | 53.89 | |
| 6 | 173 | China TONG Z | 53.95 | |
| 7 | 128 | Bahrain ESSA I | 54.19 | |
| 8 | 842 | Vietnam NGUYEN T | 54.30 | PB |
Video: 400m Women’s Finals – Asian Games 2018
