| Final 18:57 | time | | L | | 1. Rikako Ikee |  Japan | 56.30s | GR | 5 | | 2. Zhang Yufei |  China | 57.40s | | 4 | | 3. An Se-hyeon |  South Korea | 58.00s | | 3 | | 4. Ai Soma | Japan | 58.68s | | 6 | | 5. Lin Xintong | China | 58.82s | | 7 | | 6. Quah Jing Wen |  Singapore | 58.93s | | 1 | | 7. Park Ye-rin | South Korea | 59.57s | | 2 | | 8. Chan Kin Lok |  Hong Kong | 59.94s | | 8 |
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| Venue: GBK Aquatic Center. |
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Heats - Tueday 21.08 Morning session 09:48 |
| Ranking | time | | L | H | | 1. Zhang Yufei | China | 57.68s | Q | 5 | 3 | | 2. Rikako Ikee | Japan | 57.81s | Q | 4 | 3 | | 3. An Se-hyeon | South Korea | 58.97s | Q | 4 | 2 | | 4. Ai Soma | Japan | 59.16s | Q | 4 | 1 | | 5. Park Ye-rin | South Korea | 59.57s | Q | 5 | 2 | | 6. Lin Xintong | China | 59.94s | Q | 5 | 1 | | 7. Quah Jing Wen | Singapore | 1:00.08 | Q | 3 | 3 | | 8. Chan Kin Lok | Hong Kong | 1:00.39 | Q | 6 | 3 | | eliminated in Heats | | 9. Quah Ting Wen | Singapore | 1:00.41 | | 6 | 1 | | 10.Jasmine Alkhaldi |  Philippines | 1:01.04 | | 3 | 2 | | 11.Lê Thị Mỹ Thảo |  Vietnam | 1:01.26 | | 3 | 1 | | 12.Chen Yu-rong |  Taipei | 1:01.33 | | 2 | 2 | | 13.Tam Hoi Lam | Hong Kong | 1:01.72 | | 2 | 3 | | 14.Kornkarnjana Sapianchai |  Thailand | 1:01.74 | | 6 | 2 | | 15.Adinda Larasati Dewi |  Indonesia | 1:02.02 | | 2 | 1 | | 16.Huang Mei-chien | Taipei | 1:02.93 | | 7 | 3 | | 17.Jenjira Srisa-Ard | Thailand | 1:02.98 | | 8 | 1 | | 18.Sofie Kemala Fatiha | Indonesia | 1:05.97 | | 8 | 2 | | 19.Enkhkhuslen Batbayar |  Mongolia | 1:06.81 | | 7 | 2 | | 20.Kuan I Cheng |  Macau | 1:07.94 | | 7 | 1 | | 21.Mishael Aisha Ayub |  Pakistan | 1:09.61 | | 1 | 3 | | 22.Kherlen Altanshagai | Mongolia | 1:11.58 | | 1 | 2 | | 23.Miraal Zahra Haque | Pakistan | 1:17.49 | | 1 | 1 | | 24.Anmau Ahmed Saleem |  Maldives | 1:29.46 | | 8 | 3 |
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