| Final 18:00 | time | | L | | 1. Joseph Schooling |  Singapore | 51.04s | GR | 4 | | 2. Li Zhuhao |  China | 51.46s | | 3 | | 3. Yuki Kobori |  Japan | 51.77s | | 5 | | 4. Quah Zheng Wen | Singapore | 52.54s | | 6 | | 5. Adilbek Mussin |  Kazakhstan | 52.95s | | 2 | | 6. Nao Horomura | Japan | 53.00s | | 8 | | 7. Chang Gyu-cheol |  South Korea | 53.32s | | 7 | | 8. Glenn Victor Sutanto |  Indonesia | 53.89s | | 1 |
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| Venue: GBK Aquatic Center. |
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Heats - Wednesday 22.08 Morning session 09:00 |
| Ranking | time | | L | H | | 1. Joseph Schooling | Singapore | 52.31s | Q | 4 | 5 | | 2. Yuki Kobori | Japan | 52.47s | Q | 4 | 3 | | 3. Li Zhuhao | China | 52.50s | Q | 4 | 4 | | 4. Quah Zheng Wen | Singapore | 52.76s | Q | 5 | 4 | | 5. Adilbek Mussin | Kazakhstan | 52.99s | Q | 2 | 5 | | 6. Chang Gyu-cheol | South Korea | 53.20s | Q | 5 | 3 | | 7. Glenn Victor Sutanto | Indonesia | 53.29s | Q | 3 | 3 | | 8. Nao Horomura | Japan | 53.30s | Q | 5 | 5 | | eliminated in Heats | | 9. Zheng Xiaojing | China | 53.53s | | 3 | 4 | | 10.Chu Chen-ping |  Taipei | 53.98s | | 6 | 3 | | 11.Triady Fauzi Sidiq | Indonesia | 53.99s | | 3 | 5 | | 12.Sajan Prakash |  India | 54.06s | | 1 | 2 | | 13.Chan Jie |  Malaysia | 54.20s | | 2 | 4 | | 14.Artyom Kozlyuk |  Uzbekistan | 54.57s | | 6 | 4 | | 15.icholas Lim |  Hong Kong | 54.67s | | 1 | 5 | | 16.Park Jung-hun | South Korea | 54.74s | | 2 | 3 | | 17.Mehdi Ansari |  Iran | 54.88s | | 7 | 5 | | 18.Navaphat Wongcharoen |  Thailand | 54.91s | | 7 | 3 | | 18.Wang Kuan-hung | Taipei | 54.91s | | 7 | 4 | | 20.Ho Tin Long | Hong Kong | 55.05s | | 1 | 4 | | 21.Vladislav Shuliko |  Kyrgyzstan | 55.06s | | 8 | 5 | | 22.Ngô Đình Chuyền |  Vietnam | 55.97s | | 1 | 3 | | 23.Alireza Yavari Foroushani | Iran | 56.10s | | 8 | 3 | | 24.Hoàng Quý Phước | Vietnam | 56.51s | | 6 | 5 | | 25.Yacob Al-Khulaifi |  Qatar | 56.94s | | 4 | 2 | | 26.Avinash Mani | India | 56.98s | | 4 | 1 | | 27.Yousif Habib Bu Arish |  Saudi Arabia | 57.84s | | 5 | 1 | | 28.Sio Ka Kun |  Macau | 1:00.39 | | 5 | 2 | | 29.Kawas Behram Aga |  Pakistan | 1:01.16 | | 6 | 2 | | 30.Jurmed Batmunkh |  Mongolia | 1:01.33 | | 2 | 2 | | 31.Keouodom Lim |  Laos | 1:01.47 | | 3 | 2 | | -. Abbas Qali |  Kuwait | DNS | | 3 | 1 | | -. Demuul Erdenemunkh | Mongolia | DNS | | 7 | 2 | | -. Noah Al-Khulaifi | Qatar | DNS | | 8 | 4 |
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